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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C., 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2009

OR

Commission File Number: 000-51902

INFUSYSTEM HOLDINGS, INC.

(Exact Name of Registrant as Specified in its Charter)

31700 Research Park Drive

Madison Heights, Michigan 48071

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code:

(248) 291-1210

Securities Registered Pursuant to Section 12(b) of the Act:

Securities Registered Pursuant to Section 12(g) of the Act:

Common Stock, par value $0.0001 per share

(Title of Class)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  ¨    NO  x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    YES  ¨    NO  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter periods as the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  ¨    NO  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (check one)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    YES  ¨    NO  x

The aggregate market value of the registrant’s voting equity held by non-affiliates of the registrant, computed by reference to the closing sales price for the registrant’s common stock on June 30, 2009, as reported on the OTC Bulletin Board, was approximately $47,833,580. In determining the market value of the voting equity held by non-affiliates, securities of the registrant beneficially owned by directors and officers of the registrant have been excluded. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

The number of shares of the registrant’s common stock outstanding as of February 25, 2010 was 18,749,144.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of this registrant’s definitive proxy statement for its 2010 Annual Meeting of Stockholders to be filed with the SEC no later than 120 days after the end of the registrant’s fiscal year are incorporated herein by reference in Part III of this Annual Report on Form 10-K.

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Cautionary Statement about Forward-Looking Statements

This Annual Report on Form 10-K includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than statements of historical facts contained in this Annual Report on Form 10-K, including statements regarding the future financial position, business strategy and plans and objectives of management for future operations, are forward-looking statements. The words “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “should,” “plan,” “expect,” and similar expressions, as they relate to us, are intended to identify forward-looking statements. We have based these forward-looking statements largely on current expectations and projections about future events and financial trends that we believe may affect financial condition, results of operations, business strategy and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including, without limitation, those described in “Risk Factors” and elsewhere in this Annual Report on Form 10-K, including, among other things:

These risks are not exhaustive. Other sections of this Annual Report on Form 10-K include additional factors which could adversely impact our business and financial performance. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time and it is not possible for us to predict all risk factors, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.

You should not rely upon forward looking statements as predictions of future events. We cannot assure you that the events and circumstances reflected in the forward looking statements will be achieved or occur. Although we believe that the expectations reflected in the forward looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements.

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PART I

References in this Annual Report on Form 10-K to “we,” “us,” or the “Company” are to InfuSystem Holdings, Inc. and its subsidiary. From September 28, 2006 through October 25, 2007, the subsidiary was Iceland Acquisition Subsidiary, Inc. (“Iceland Acquisition Subsidiary”). As of October 25, 2007, the subsidiary was InfuSystem, Inc. (“InfuSystem”).

Background

We were formed as a Delaware blank check company in 2005 for the purpose of acquiring through a merger, capital stock exchange, asset acquisition or other similar business combination, one or more operating businesses in the healthcare sector. We completed our initial public offering on April 18, 2006. On September 29, 2006, we entered into a Stock Purchase Agreement (as, amended the “Stock Purchase Agreement”) with I-Flow Corporation (“I-Flow”), Iceland Acquisition Subsidiary, our wholly-owned subsidiary, and InfuSystem, a wholly-owned subsidiary of I-Flow Corporation. Upon the closing of the transactions contemplated by the Stock Purchase Agreement on October 25, 2007, Iceland Acquisition Subsidiary purchased all of the issued and outstanding capital stock of InfuSystem from I-Flow and concurrently merged with and into InfuSystem. As a result of the merger, Iceland Acquisition Subsidiary ceased to exist as an independent entity and InfuSystem, as the corporation surviving the merger, became our wholly-owned subsidiary. Effective October 25, 2007, we changed our corporate name from “HAPC, INC.” to InfuSystem Holdings, Inc.

InfuSystem was incorporated under the laws of the State of California in December 1997 under the name I-Flow Subsidiary, Inc., as a wholly owned subsidiary of I-Flow. In February 1998, I-Flow Subsidiary, Inc. acquired Venture Medical, Inc. and InfuSystem II, Inc. in a merger transaction pursuant to which I-Flow Subsidiary, Inc. as the surviving corporation changed its name to InfuSystem, Inc.

Business Concept and Strategy

We are a provider of ambulatory infusion pump management services for oncologists in the United States. Ambulatory infusion pumps are small, lightweight electronic pumps designed to be worn by patients and which allow patients the freedom to move about while receiving chemotherapy treatments. The pumps are battery powered and attached to intravenous administration tubing, which is in turn attached to a reservoir or plastic cassette that contains the chemotherapy drug.

Our business model is currently focused on oncology chemotherapy infusion primarily for colorectal cancer. To our knowledge, we are the only national ambulatory infusion pump service provider focused on oncology.

We supply electronic ambulatory infusion pumps and associated disposable supply kits to physicians’ offices, infusion clinics and hospital outpatient chemotherapy clinics to be utilized by patients who receive continuous chemotherapy infusions. We obtain an assignment of insurance benefits from the patient, bill the insurance company or patient accordingly, and collect payment. We provide pump management services for the pumps and associated disposable supply kits to over 1,300 oncology practices in the United States. We retain title to the pumps during this process. In addition, we sell or rent pole-mounted or ambulatory infusion pumps for use within the oncology practice and we sell safety devices for cytotoxic drug transfer and administration.

We purchase electronic ambulatory infusion pumps from a variety of suppliers on a non-exclusive basis. Such pumps are generic in nature and are available to our competitors. The pumps are currently used primarily for continuous infusion of chemotherapy drugs for patients with colorectal cancer.

One aspect of our business strategy over the next one to three years is to expand into treatment of other cancers. We currently generate approximately 20% of our revenue from treatments for disease states other than

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colorectal cancer. There are a number of approved treatment regimens for head and neck, pancreatic, esophageal and other gastric cancers which present opportunities for growth. There are also a number of other drugs currently approved by the U.S. Food and Drug Administration (the “FDA”), as well as agents in the pharmaceutical development pipeline, which we believe could potentially be used with continuous infusion protocols for the treatment of other diseases in addition to colorectal cancer. Drugs or protocols currently in clinical trials may also obtain regulatory approval over the next several years. If these new drugs obtain regulatory approval for use with continuous infusion protocols, we expect the pharmaceutical companies to focus their sales and marketing forces on promoting the new drugs and protocols to physicians.

Another aspect of our business strategy over the next one to three years is to actively pursue opportunities for the expansion of our business through strategic alliances, joint ventures and/or acquisitions. We believe there are opportunities to acquire smaller, regional competitors that perform similar services to us, but they do not have the national market access, network of third party payor contracts or operating economies of scale that we currently enjoy. We also plan to leverage our extensive networks of oncologist practices and insurers by distributing complementary products and introducing key new services.

We face risks that other competitors can provide the same services as us. Those risks are currently mitigated by our existing third party payor contracts and economies of scale, which allow for predictable reimbursement and less costly purchase and management of the pumps, respectively. Additionally, we have already established a long standing relationship as a provider of pumps to over 1,300 oncology practices in the United States. We believe that there are competitive barriers to entry against other suppliers with respect to these oncology practices because we have an established national presence and third party payor contracts in place covering approximately 195 million third party payor lives, (i.e., persons enrolled in various managed care plans or commercial insurance carriers such as health maintenance organizations and preferred provider organizations) increasing the likelihood that we participate in the insurance networks of patients to whom physicians wish to refer to an ambulatory infusion pump provider. Moreover, we have an available inventory of approximately 20,000 active ambulatory infusion pumps, which may allow us to be more responsive to the needs of physicians and patients than a new market entrant. We do not perform any research and development.

Continuous Infusion Therapy

Continuous infusion of chemotherapy involves the gradual administration of a drug via a small, lightweight, portable electronic infusion pump over a prolonged period of time, defined as greater than 8 hours, and up to 24 hours daily. A cancer patient can receive his or her medicine anywhere from 1 to 30 days per month depending on the chemotherapy regimen that is most appropriate to that individual’s health status and disease state. This may be followed by periods of rest and then repeated cycles with treatment goals of progression free disease survival. This drug administration method has replaced “bolus” administration in specific circumstances. The advantages of slow continuous low doses of specific drugs are well documented. Clinical studies support use of continuous infusion chemotherapy for decreased toxicity without loss of anti-tumor efficacy. The 2009/2010 National Comprehensive Cancer Network (NCCN) Guidelines recommend the use of continuous infusion for treatment of numerous cancer diagnoses. We believe that the growth of continuous infusion therapy is driven by three factors: evidence of improved clinical outcomes; lower toxicity and side effects; and a favorable reimbursement environment.

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Services

Our core service is to provide oncology offices, infusion clinics and hospital out-patient chemotherapy clinics with ambulatory infusion pumps in addition to related supplies for patient use, and then directly bill and collect payment from payors and patients for the use of these pumps. We own approximately 20,000 pumps. At any given time, it is estimated that approximately 60% of the pumps are in the possession of patients. The remainder of the pumps is in transport for cleaning and calibration, or in oncology clinics as back-ups.

After a doctor determines that a patient is eligible for ambulatory infusion pump therapy, the doctor arranges for the patient to receive an infusion pump and provides the necessary chemotherapy drugs. The oncologist and nursing staff train the patient in the use of the pump and initiate service. The physician bills insurers, Medicare, Medicaid, third party payor companies or patients (collectively, “payors”) for the physician’s professional services associated with initiating and supervising the infusion pump administration, as well as the supply of drugs. We directly bill payors for the use of the pump and related disposable supplies. We have contracts with more than 200 payors that cover approximately 195 million third party payor lives. Billing to payors requires coordination with patients and physicians who initiate the service, as physicians’ offices must provide us with appropriate paperwork (patient’s insurance information, physician’s order and an acknowledgement of benefits that shows receipt of equipment by the patient) in order for us to bill the payors.

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In addition to providing high quality and convenient care, we believe that our pump management program offers significant economic benefits for patients, providers and payors.

Relationships with Physician Offices

We maintain deep business relationships with clinical oncologists in more than 1,300 practices. Though this represents a substantial portion of the oncologists in the United States, we believe we can continue to expand our network to further penetrate the oncology market. We believe our relationships with physician offices are strong, as evidenced by our significant retention rates and the results of professional customer satisfaction research we conduct.

We believe that, in general, we do not compete directly with hospitals and physician offices to treat patients. Rather, by providing products and services to hospitals and physician offices and other care facilities and providers, we believe that we can help providers keep up with increasing patient demand and manage institutional constraints on capital and manpower due to the nature of limited resources in hospitals and physician offices.

Billing and Collection Services

Prior to our acquisition of InfuSystem, InfuSystem had been providing billing and collection services to I-Flow for its ON-Q^® product. On October 25, 2007, InfuSystem and I-Flow entered into an Amended and Restated Services Agreement (the “Services Agreement”) pursuant to which InfuSystem agreed to continue to provide I-Flow with these services. The initial term of the Services Agreement was three years. The Services Agreement was to automatically renew for succeeding one year terms unless terminated pursuant to certain cancellation provisions. I-Flow agreed to pay InfuSystem a monthly service fee equal to the greater of (i) the monthly expenses for those InfuSystem employees devoted to the billing, collection and management services provided to I-Flow which expenses shall consist of (a) salaries and wages, (b) payroll taxes and (c) group insurance, in addition to an amount equal to 40% of the sums of items (a) through (c) or (ii) a performance-based fee equal to 25% of the total actual net cash collections (net of adjustments) received during such month on behalf of I-Flow.

During 2009, we recorded revenues of $160,000 from this arrangement, which are included in net revenues.

On November 8, 2007, I-Flow informed us that it was terminating the Services Agreement effective May 10, 2008. In May 2008, both parties extended and amended the Services Agreement for one month, upon

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substantially the same terms and conditions as the original agreement. From June 2008 through December 1, 2008, the parties operated without a written agreement, upon substantially the same terms and conditions as the original Services Agreement, with the exception that the original 40% mark-up was increased to 50%. On December 2, 2008, we agreed with I-Flow to extend the Services Agreement to September 30, 2009. Pursuant to the terms of the extension, the service fee paid to us through January 31, 2009 was calculated based on a 50% mark up. Effective February 1, 2009 through June 30, 2009, the service fee was equal to 30% of the total actual net cash collections (net of adjustments) received during such month on behalf of I-Flow. I-Flow also reimbursed us monthly for the portion of our lease cost associated with the office space dedicated to this operation. Effective July 1, 2009 we agreed to continue the services arrangement on a month to month basis, during which time I-Flow reimbursed us the greater of 30% of net cash collections or $3,000. The service was discontinued effective August 31, 2009.

Employees

As of December 31, 2009, we had 125 employees, including 117 full-time employees and 8 part-time employees. None of our employees are unionized.

Material Suppliers

We supply a wide variety of pumps and associated equipment, as well as disposables and ancillary supplies. The majority of our pumps are electronic ambulatory pumps purchased from the following manufacturers, each of which is material and supplies more than 10% of the pumps purchased by us: Smiths Medical, Inc.; Hospira Worldwide, Inc.; and WalkMed Infusion, LLC (formerly known as McKinley Medical, LLC). There are no supply agreements in place with any of the suppliers. All purchases are handled pursuant to pricing agreements, which contain no material terms other than prices that are subject to change by the manufacturer. As of December 31, 2009, we owned approximately 20,000 active pumps.

Seasonality

Our business is not subject to seasonality.

Environmental Laws

We are required to comply with applicable environmental laws regulating the disposal of cleaning agents used in the process of cleaning our ambulatory infusion pumps, as well as the disposal of sharps and blood products used in connection with the pumps. We do not believe that compliance with such laws has a material effect on our business.

Significant Customers

We have sought to establish contracts with as many third party payor organizations as commercially practicable, in an effort to ensure that reimbursement is not a significant obstacle for providers who recommend continuous infusion therapy and wish to utilize our services. A third party payor organization is a health care payor (or a group of medical services payors) that contracts to provide a wide variety of healthcare services to enrolled members through participating providers (such as us). A payor is any entity that pays on behalf of a member patient.

We currently have contracts with more than 200 third party payor plans that cover approximately 195 million lives. Material terms of contracts with third party payor organizations are typically a set fee or rate, or discount from billed charges for equipment provided. These contracts generally provide for a term of one year, with automatic one-year renewals, unless we or the contracted payor do not wish to renew. Our largest contracted payor is Medicare, which accounted for approximately 31% of our gross billings for the fiscal year ended

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December 31, 2009. Our contracts with various individual Blue Cross/Blue Shield affiliates in the aggregate accounted for approximately 22% of our gross billings for the fiscal year ended December 31, 2009. We also contract with various other third party payor organizations, commercial Medicare replacement plans, self insured plans and numerous other insurance carriers. No individual payor (other than Medicare and the Blue Cross/Blue Shield entities) accounts for greater than approximately 6% of our gross billings.

Competitors

We believe that our competition is primarily composed of regional providers, hospital-owned durable medical equipment (“DME”) providers, physician providers and home care infusion providers. An estimate of the number of competitors is not known or reasonably available, due to the wide variety in type and size of the market participants described below. We are not aware of any industry reports with respect to the competitive market described below. The description of market segments and business activities within those market segments is based on our experiences in the industry.

Regulation of Our Business

Our business is subject to certain regulations. Specifically, as a Medicare supplier of DME and related supplies, we must comply with DMEPOS Supplier Standards established by the Health Care Financing Administration regulating Medicare suppliers of DME and prosthetics, orthotics and supplies (“DMEPOS”). The DMEPOS Supplier Standards consist of 26 requirements that must be met in order for a DMEPOS supplier to be

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eligible to receive payment for a Medicare-covered item. Some of the more significant DMEPOS Supplier Standards require us to (i) advise Medicare beneficiaries of their option to purchase certain equipment, (ii) honor all warranties under state law and not charge Medicare beneficiaries for the repair or replacement of equipment or for services covered under warranty, (iii) permit agents of the Centers for Medicare and Medicaid Services to conduct on-site inspections to ascertain compliance with the DMEPOS Supplier Standards, (iv) maintain liability insurance, (v) refrain from contacting Medicare beneficiaries by telephone, except in certain limited circumstances, (vi) answer questions and respond to complaints of beneficiaries regarding the supplied equipment, (vii) disclose the DMEPOS Supplier Standards to each Medicare beneficiary to whom it supplies equipment, (viii) maintain a complaint resolution procedure and record certain information regarding each complaint, (ix) maintain accreditation from a CMS approved accreditation organization and, (x) meet the surety bond requirements specified in 42 C.F.R. 424.57.

We are also subject to the provisions of the Health Insurance Portability and Accountability Act of 1996 (“HIPAA”) designed to protect the security and confidentiality of certain patient health information. Under HIPAA, we must provide patients with access to certain records and must notify patients of our use of personal medical information and patient privacy rights. Moreover, HIPAA sets limits on how we may use individually identifiable health information and prohibits the use of patient information for marketing purposes. The adoption of the American Recovery and Reinvestment Act of 2009 (“ARRA”) includes a new breach notification requirement that applies to breaches of unsecured health information occurring on or after September 23, 2009.

Available Information

Our Internet address is www.infusystem.com. On this Web site, we post the following filings as soon as reasonably practicable after they are electronically filed with or furnished to the U.S. Securities and Exchange Commission (the “SEC”): our Annual Report on Form 10-K; our Quarterly Reports on Form 10-Q; our Current Reports on Form 8-K; our proxy statement related to our annual stockholders’ meeting; and any amendments to those reports or statements. All such filings are available on our Web site free of charge. The content on our Web site is not incorporated by reference into this Annual Report on Form 10-K unless expressly noted.

An investment in our securities involves a high degree of risk. You should consider carefully all of the material risks described below, together with the other information contained in this Annual Report on Form 10-K. If any of the following events occur, our business, financial condition, results of operations and cash flows may be materially adversely affected.

RISK FACTORS RELATING TO OUR BUSINESS AND THE INDUSTRY IN WHICH WE OPERATE.

We are dependent on our Medicare Supplier Number.

We have obtained a Medicare Supplier Number and are required to comply with Medicare Supplier Standards in order to maintain such number. If we are unable to comply with the relevant standards, we could lose our Medicare Supplier Number. The loss of such identification number for any reason would prevent us from billing Medicare for patients who rely on Medicare to pay their medical expenses and, as a result, we would experience a decrease in our revenues. Furthermore, all third party and Medicaid contracts require us to have a Medicare Supplier Number. Without such a number, we would be unable to continue our various third party and Medicaid contracts. A significant portion of our revenue is dependent upon our Medicare Supplier Number.

The Center for Medicare and Medicaid Services (“CMS”) has issued a ruling that all DME providers must be accredited by a recognized accrediting entity by September 30, 2009. On February 17, 2009, we received accreditation from Community Health Accreditation Program (CHAP), thus meeting this CMS requirement.

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Changes in third-party reimbursement rates may adversely impact our revenues.

We depend primarily on third-party reimbursement for the collection of our revenues. We are paid directly by private insurers and governmental agencies, often on a fixed fee basis, for continuous infusion equipment and related disposable supplies provided to patients. If the average fees allowable by private insurers or governmental agencies were reduced, the negative impact on revenues could have a material adverse effect on our financial condition, results of operations and cash flows. Also, if collection amounts owed to us by patients and insurers is reduced, we may be required to increase our bad debt expense and/or decrease our revenues.

Any change in the overall healthcare reimbursement system may adversely impact our business.

Changes in the healthcare reimbursement system often create financial incentives and disincentives that encourage or discourage the use of a particular type of product, therapy or clinical procedure. Market acceptance of continuous infusion therapy may be adversely affected by changes or trends within the healthcare reimbursement system. Changes to the health care reimbursement system that favor technologies or treatment regimens other than InfuSystem’s or that reduce reimbursements to providers or treatment facilities that use InfuSystem’s products, may adversely affect InfuSystem’s ability to market its products profitably.

Our success is impacted by the availability of the chemotherapy drugs that are used in our continuous infusion pump systems.

We primarily derive our revenue from the rental of ambulatory infusion pump systems to oncology patients through physicians’ offices and chemotherapy clinics. A shortage in the availability of chemotherapy drugs that are used in the continuous infusion pump systems, including the commonly-used chemotherapy drug known as 5-Fluorouracil, could have a material adverse effect on InfuSystem’s financial condition, results of operations and cash flows. For instance, we believe that a shortage of 5-Fluorouracil in the fourth quarter of 2005 resulted in an unfavorable revenue impact in excess of $1,000,000, and a shortage of Leucovorin in late 2008 and early 2009 caused some minor impacts to revenue timing without a material impact on our overall results. Shortages of 5-Fluorouracil, Leucovorin or other commonly-used chemotherapy drugs could negatively impact InfuSystem’s results of operations, financial condition and cash flows.

If future clinical studies demonstrate that oral medications are as effective or more effective than continuous infusion therapy, or if such studies demonstrate that alternative therapies that do not utilize continuous infusion therapy are more effective than current standards of care, our business could be adversely affected.

Continuous infusion therapy is currently preferred by many physicians over oral medication treatment despite the more cumbersome aspects of maintaining a continuous infusion regimen. The reasons for these physicians’ preference are varied, including a belief that continuous infusion therapy involves fewer adverse side effects, reduces compliance issues and may provide greater therapeutic benefits. Numerous clinical trials are currently ongoing, evaluating and comparing the therapeutic benefits of current continuous infusion-based regimens with various oral medication regimens. If these clinical trials demonstrate that oral medications provide equal or greater therapeutic benefits and/or demonstrate reduced side effects compared to prior oral medication regimens, our revenues and overall business could be materially and adversely affected. Additionally, if new oral medications are introduced to the market that are superior to existing oral therapies, physicians’ willingness to prescribe continuous infusion-based regimens could decline, which would adversely affect our financial condition, results of operations and cash flows.

Continuous infusion therapy is currently used in a variety of therapeutic regimens that are standards of care for particular types and stages of cancer. Numerous clinical trials are currently ongoing evaluating oral chemotherapy agents as well as other combinations of drugs, both oral and infused. InfuSystem has no influence over the outcome of trials including whether they are favorable or not favorable toward the use of continuous infusion therapy. If such trials demonstrate superior clinical outcomes for regimens that do not use continuous infusion relative to the outcomes of those that do use continuous infusion, our business could be negatively impacted.

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The current global financial crisis may negatively impact our business, results of operations, financial condition and/or liquidity.

The current global financial crisis affecting the banking system and financial markets, as well as the uncertainty in global economic conditions, have resulted in a significant tightening of credit markets, a low level of liquidity in financial markets and reduced corporate profits and capital spending. As a result, our customers (patients and payors) may face issues gaining timely access to sufficient credit, which could result in an impairment of their ability to make timely payments to us. In addition, the current global financial crisis could also adversely impact our suppliers’ ability to provide us with materials and components, either of which may negatively impact our financial condition, results of operations and cash flows. The financial crisis could also adversely impact our ability to access the financial markets.

Although we maintain allowances for doubtful accounts for estimated losses resulting from the inability of our customers to make required payments and such losses have historically been within our expectations and the provisions established, we cannot guarantee that we will continue to experience the same loss rates that we have in the past, especially given the current turmoil of the worldwide economy.

State licensure laws for DME suppliers are subject to change. If we fail to comply with any state’s laws, we will be unable to operate as a DME supplier in such state and our business operations will be adversely affected.

As a DME supplier operating in all 50 states of the United States, we are subject to each state’s licensure laws regulating DME suppliers. State licensure laws for DME suppliers are subject to change and we must ensure that we are continually in compliance with the laws of all 50 states. In the event that we fail to comply with any state’s laws governing the licensing of DME suppliers, we will be unable to operate as a DME supplier in such state until we regain compliance. We may also be subject to certain fines and/or penalties and our business operations could be adversely affected.

Our growth strategy includes expanding into treatment for cancers other than colorectal. There can be no assurance that continuous infusion-based regimens for these other cancers will become standards of care for large numbers of patients or that we will be successful in penetrating these different markets.

An aspect of our growth strategy is to expand into the treatment of other cancers, such as head, neck and gastric. Currently, relatively small percentages of these patients are treated with regimens that include continuous infusion therapy. That population will expand only if clinical trial results for new drugs and new combinations of drugs demonstrate superior outcomes for regimens that include continuous infusion therapy relative to alternatives. No assurances can be given that these new drugs and drug combinations will be approved or will prove superior to oral medication or other treatment alternatives. In addition, no assurances can be given that we will be able to penetrate successfully any new markets that may develop in the future or manage the growth in additional resources that would be required.

The industry in which we operate is intensely competitive and changes rapidly. If we are unable to successfully compete with our competitors, our business operations may suffer.

The drug infusion industry is highly competitive. We compete in this industry based primarily on service and performance. Some of our competitors and potential competitors have significantly greater resources than we do for research and development, marketing and sales. As a result, they may be better able to compete for market share, even in areas in which our services may be superior. The industry is subject to technological changes and such changes may put our current fleet of pumps at a competitive disadvantage. If we are unable to effectively compete in our market, our financial condition, results of operations and cash flows may materially suffer.

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Our industry is dependent on regulatory guidelines that affect our billing practices. Given our large presence in the industry, we run the risk of losing business to competitors due to our unwillingness to compromise acceptable billing practices dictated by CMS and other insurance plans.

Aggressive competitors (e.g. smaller regional companies) may not fully comply with rules pertaining to documentation required by CMS and other payors for patient billing. Competitors who don’t meet the same standards of compliance that we do with regards to billing regulations, can put us at a potential competitive disadvantage. We are a participating provider with Medicare and under contract with more than 200 additional insurance plans, all of which have very stringent guidelines. Our strong commitment to fully meeting compliance with CMS Supplier Standards, HIPAA/Security Rules, CHAP accreditation requirements and commercial payor guidelines may put us at risk of losing customers to competitors with more lenient billing practice standards which could appear more convenient to the customer.

We rely on independent suppliers for our products. Any delay or disruption in the supply of products, particularly our supply of electronic ambulatory pumps, may negatively impact our operations.

Our infusion pumps are obtained from outside vendors. The majority of our pumps are electronic ambulatory infusion pumps which are supplied to us by three major suppliers: Smiths Medical, Inc.; Hospira Worldwide, Inc.; and WalkMed Infusion, LLC (formerly known as McKinley Medical, LLC). The loss or breakdown of our relationships with even one of these outside vendors could subject us to substantial delays in the delivery of our products to customers. Significant delays in the delivery of products could result in possible cancellation of orders and the loss of customers. Our inability to provide products to meet delivery schedules could have a material adverse effect on our reputation in the industry, as well as our financial condition, results of operations and cash flows.

Although we do not manufacture the products we distribute, if one of the products distributed by us proves to be defective or is misused by a health care practitioner or patient, we may be subject to liability that could adversely affect our financial condition and results of operations.

Although we do not manufacture the products that we distribute, a defect in the design or manufacture of one of the products distributed by us, or a failure of products distributed by us to perform for the use specified, could have a material adverse effect on our reputation in the industry and subject us to claims of liability for injuries and otherwise. Misuse of products distributed by us by a practitioner or patient that results in injury could similarly subject us to liability. Any substantial underinsured loss could have a material adverse effect on our financial condition, results of operations and cash flows. Furthermore, any impairment of our reputation could have a material adverse effect on our revenues and prospects for future business.

We intend to actively pursue opportunities for the further expansion of our business through strategic alliances, joint ventures and/or acquisitions. Future strategic alliances, joint ventures and/or acquisitions may require significant resources and/or result in significant unanticipated costs or liabilities to us.

Over the next two to three years we intend to actively pursue opportunities for the further expansion of our business through strategic alliances, joint ventures and/or acquisitions. Any future strategic alliances, joint ventures or acquisitions will depend on our ability to identify suitable partners or acquisition candidates, as the case may be, negotiate acceptable terms for such transactions and obtain financing, if necessary. Under the terms of the Credit and Guaranty Agreement with Kimberly-Clark (formerly I-Flow), we are not permitted to complete any business acquisitions. We also face competition for suitable acquisition candidates which may increase our costs. Acquisitions or other investments require significant managerial attention, which may be diverted from our other operations. Any future acquisitions of businesses could also expose us to unanticipated liabilities.

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The preparation of our financial statements in accordance with accounting principles generally accepted in the United States requires us to make estimates, judgments, and assumptions that may ultimately prove to be incorrect.

The accounting estimates and judgments that management must make in the ordinary course of business affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the periods presented. If management misinterprets GAAP in making such estimates and judgments, subsequent adjustments resulting from errors could have a material adverse effect on our operating results for the period or periods in which the change is identified. Additionally, subsequent adjustments from errors could require us to restate our financial statements. Restating financial statements could result in a material decline in the price of our stock.

RISK FACTORS RELATING SPECIFICALLY TO OUR COMMON STOCK AND WARRANTS

The market price of our common stock and warrants has been, and is likely to remain, volatile and may decline in value.

The market price of our common stock and warrants has been and is likely to continue to be volatile. Market prices for securities of healthcare services companies, including ours, have historically been volatile, and the market has from time to time experienced significant price and volume fluctuations that appear unrelated to the operating performance of particular companies. The following factors, among others, can have a significant effect on the market price of our securities:

The realization of any risks described in these “Risk Factors” could also have a negative effect on the market price of our common stock and warrants.

We do not pay dividends and this may negatively affect the price of our stock.

Under the terms of the Credit and Guaranty Agreement with Kimberly-Clark (formerly I-Flow), we are not permitted to pay dividends on our common stock and do not anticipate paying dividends on our common stock in the foreseeable future. The future price of our common stock may be adversely impacted because we do not pay dividends.

Holders of our warrants may not be able to exercise the warrants if we do not maintain an effective registration statement and current prospectus covering the shares of common stock underlying the warrants.

If we do not maintain an effective registration statement and a current prospectus covering the shares of common stock issuable upon exercise of our outstanding warrants or comply with applicable state securities laws, holders of our warrants may not be able to exercise the warrants issued by us. In order for holders of our warrants to be able to exercise the warrants, the shares of common stock underlying the warrants must be covered

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by an effective registration statement and a current prospectus or be qualified for sale or exempt from qualification under the applicable securities laws of the state in which the warrant holder resides. Although we cannot assure holders of our warrants that we will have a successful registration outcome with the SEC, we will use our best efforts to provide an effective registration statement and a prospectus covering the shares of our common stock underlying the outstanding warrants at all times when the market price of the common stock exceeds the exercise price of the warrants until the expiration of the warrants.

Future sales of our common stock may depress our stock price.

The market price of our common stock could decline as a result of sales of substantial amounts of our common stock in the public market, or the perception that these sales could occur. In addition to the shares of our common stock currently available for sale in the public market, shares of our common stock sold in past private placements (which include shares held by certain members of our board of directors) and the shares of common stock underlying our outstanding warrants are subject to registration rights. If the holders of these securities choose to exercise their registration rights, this would result in an increase in the number of shares of our common stock available for resale in the public market, which in turn could lead to a decrease in our stock price and a dilution of stockholders’ ownership interests. These factors could also make it more difficult for us to raise funds through future equity offerings. As of February 25, 2010 we had 18,749,144 shares of our common stock outstanding not including the 35,108,219 shares of common stock underlying our outstanding warrants.

Our Warrant Exchange Offer may not achieve our desired results.

On February 16, 2010, we offered to exchange shares of our common stock for any or all of our outstanding warrants. By offering warrantholders the opportunity to exchange their outstanding warrants for common stock, we hope to encourage warrantholders to exchange their warrants immediately so that we can eliminate or reduce the warrant overhang on our common stock and attract new equity investors. We also expect that the Exchange Offer will increase the number of holders of our common stock which we anticipate will facilitate our ability to list the common stock on a national securities exchange. If a significant number of warrantholders choose not to exchange their warrants for shares of common stock, we may be unsuccessful in removing the overhang, attracting new equity investors, and/or listing our common stock on a national securities exchange.

Because our common stock is quoted on the OTC Bulletin Board, the ability of our stockholders to sell their shares in the secondary trading market may be limited.

Our common stock is currently quoted on the OTC Bulletin Board. Consequently, the liquidity of our common stock is limited, not only in the number of shares that are bought and sold, but also through delays in the timing of transactions and coverage by security analysts and the news media, if any, of our company. As a result, prices for shares of our common stock may be lower than might otherwise prevail if our common stock was quoted and traded on an exchange.

Certain anti-takeover provisions in our amended and restated certificate of incorporation and bylaws and the Delaware General Corporation Law (the “DGCL”) may discourage, delay or prevent a change in control of our company and adversely affect the trading price of our common stock.

Our amended and restated certificate of incorporation and bylaws and the DGCL contain certain anti-takeover provisions which may discourage, delay or prevent a change in control of our company that our stockholders may consider favorable and, as a result, adversely affect the trading price of our common stock. Our amended and restated certificate of incorporation authorizes our Board of Directors to issue up to 1,000,000 shares of blank check preferred stock. The Board of Directors may use the blank check preferred stock to implement a shareholder rights plan as a defensive measure against a potential acquiror. Our amended and restated bylaws include provisions establishing advance notice procedures with respect to stockholder proposals and director nominations and permitting only stockholders holding at least a majority of our outstanding common

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stock to call a special meeting. Our amended and restated bylaws also provide that in lieu of a meeting, stockholders may only take action by unanimous written consent. Additionally, as a Delaware corporation, we are subject to section 203 of the DGCL, which, among other things, and subject to various exceptions, restricts certain business transactions between a corporation and a stockholder owning 15% or more of the corporation’s outstanding voting stock (“an interested stockholder”) for a period of three years from the date the stockholder becomes an interested stockholder.

None.

We do not own any real property. We lease office and warehouse space at 31700 Research Park Dr, Madison Heights, Michigan. We believe that such office and warehouse space is suitable and adequate for our business.

We are involved in legal proceedings arising out of the ordinary course and conduct of our business, the outcomes of which are not determinable at this time. We have insurance policies covering such potential losses where such coverage is cost effective. In our opinion, any liability that might be incurred by us upon the resolution of these claims and lawsuits will not, in the aggregate, have a material adverse effect on our financial condition, results of operations or cash flows.

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PART II

Our common stock, warrants and units are currently traded on the OTC Bulletin Board under the symbols INHI.OB, INHIW.OB and INHIU.OB, respectively. Prior to January 14, 2008, our common stock, warrants and units were traded on the OTC Bulletin Board under the symbols HAPN.OB, HAPNW.OB and HANPU.OB, respectively.

Each warrant entitles the holder to purchase from us one share of our common stock at an exercise price of $5.00. Our warrants will expire at 5:00 p.m., New York City time, on April 11, 2011, or earlier upon redemption.

The following tables set forth, for the calendar quarter indicated, the quarterly high and low bid information of our units, common stock and warrants, respectively, as reported on the OTC Bulletin Board. The quotations listed below reflect interdealer prices, without retail markup, markdown or commission and may not necessarily represent actual transactions.

Units

Common Stock

Warrants

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Holders of Common Equity

As of February 25, 2010, we had approximately 109 stockholders of record of our common stock. This does not include beneficial owners of our common stock, including Cede & Co., nominee of the Depository Trust Company.

Dividends

We have not paid any dividends on our common stock to date. The payment of dividends in the future will be contingent upon our revenues and earnings, if any, capital requirements and general financial condition. It is the present intention of our board of directors to retain all earnings, if any, for use in our business operations and, accordingly, our board of directors does not anticipate declaring any dividends in the foreseeable future. Under the terms of the Credit and Guaranty Agreement with Kimberly-Clark (formerly I-Flow), we are not permitted to pay any dividends.

Equity Compensation Plan Information

The following table provides information as of December 31, 2009 with respect to compensation plans (including individual compensation arrangements) under which our equity securities are authorized for issuance.

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Stock Performance Graph

The graph set forth below compares the change in the our cumulative total stockholder return on our common stock between June 15, 2006, (the date that our common stock became separately tradeable from our units) and December 31, 2009 with the cumulative total return of the NASDAQ Composite Index and the NASDAQ Biotechnology Index during the same period. This graph assumes the investment of $100 on June 15, 2006 in our common stock and each of the comparison groups and assumes reinvestment of dividends, if any. We have not paid any dividends on our common stock, and no dividends are included in the report of our performance. This graph is not “soliciting material,” is not deemed filed with the SEC and is not to be incorporated by reference in any of our filings under the Securities Act or the Exchange Act whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

Recent Sales of Unregistered Securities

As described in our Current Reports on Form 8-K filed on January 3, 2007, May 4, 2007 and September 12, 2007, during 2006 and 2007, we sold an aggregate of 1,357,717 warrants to purchase our common stock to members of our board of directors and our former Chief Financial Officer in private placement transactions made in reliance upon the exemption from securities registration afforded by Section 4(2) under the Securities Act and Regulation D thereunder.

Repurchases of Equity Securities

None.

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InfuSystem Holdings, Inc. and Subsidiary

You should read the following selected financial data together with our financial statements and related notes included in Item 8 of this Annual Report on Form 10-K, and with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in Item 7 of this Annual Report on Form 10-K. We have derived the statement of operations data for the years ended December 31, 2009, 2008 and 2007 and the balance sheet data as of December 31, 2009 and 2008 from our audited financial statements, which are included in Item 8 of this Annual Report on Form 10-K. We have derived the statement of operations data for the year ended December 31, 2006 and the balance sheet data as of December 31, 2007 and 2006 from our audited financial statements, which are not included in this report. Our historical results for any prior period are not necessarily indicative of results to be expected for any future period. The information for InfuSystem Holdings, Inc. for the fiscal year ended December 31, 2007 includes operations for InfuSystem from October 26, 2007 through December 31, 2007.

Statement of Operations Data (1)

Balance Sheet Data (at period end) (1)

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Predecessor InfuSystem

The following historical information was derived from the audited financial statements of Predecessor InfuSystem for the period from January 1, 2007 to October 25, 2007 and the related notes and schedules thereto (“Predecessor InfuSystem”), which are included in this Annual Report on Form 10-K. Statement of operations data for fiscal years ended December 31, 2006, 2005 and 2004 and the balance sheet data as of December 31, 2006, 2005 and 2004 was derived from the audited financial statements of Predecessor InfuSystem, which are not included in this report.

Statement of Operations Data

Balance Sheet Data (at period end)

Executive Overview

Included in this Annual Report on Form 10-K are the results of operations of both the Company and Predecessor InfuSystem. The Company’s results of operations are presented for the fiscal years ended December 31, 2009, 2008 and 2007. The Company’s results of operations for the fiscal year ended December 31, 2007 include the operations of InfuSystem for a sixty seven day period from October 26, 2007 to December 31, 2007. The results of operations of Predecessor InfuSystem are presented for the period from January 1, 2007 to October 25, 2007, the date of consummation of the acquisition.

The financial statements and supplementary data of Predecessor InfuSystem presented for the period prior to October 26, 2007 are not those of the Company and were prepared by the former management of Predecessor InfuSystem and were independently audited. The financial statements and supplementary data of Predecessor InfuSystem for the period prior to October 26, 2007 may be particularly unrepresentative of the operations of the Company going forward for the following reasons, among others:

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InfuSystem Holdings, Inc. Overview

We were formed as a Delaware blank check company in 2005 for the purpose of acquiring through a merger, capital stock exchange, asset acquisition or other similar business combination, one or more operating businesses in the healthcare sector. On September 29, 2006, we entered into a Stock Purchase Agreement with I-Flow Corporation (“I-Flow”), Iceland Acquisition Subsidiary, Inc. (“Acquisition Subsidiary”) and InfuSystem, Inc. (“InfuSystem”). Upon the closing of the transactions contemplated by the Stock Purchase Agreement on October 25, 2007, Acquisition Subsidiary purchased all of the issued and outstanding capital stock of InfuSystem from I-Flow and concurrently merged with and into InfuSystem. As a result of the merger, Acquisition Subsidiary ceased to exist as an independent entity and InfuSystem, as the corporation surviving the merger, became our wholly-owned subsidiary. Effective October 25, 2007, we changed our corporate name from “HAPC, INC.” to InfuSystem Holdings, Inc.

InfuSystem Holdings, Inc. Results of Operations for the Fiscal Year ended December 31, 2009

Revenues

Our revenue is predominantly derived from our rental of ambulatory infusion pumps which are primarily used for continuous infusion of chemotherapy drugs for patients with colorectal cancer. Our revenue for the year ended December 31, 2009 was $38,964,000, a 10% improvement compared to $35,415,000 for the year ended December 31, 2008. The increase in revenues is primarily due to obtaining business at new customer facilities, improved operational efficiency tools which led to successful billing of older or delayed documentation, as well as increased reimbursement.

Management anticipates that new revenue growth will come from continuing to obtain business from new customer facilities, as well as the expansion of the existing use of our ambulatory infusion pumps for the treatment of colorectal cancer, as well as head, neck and gastric cancer. Another aspect of our business strategy is to actively pursue opportunities for the expansion of our business through strategic alliances, joint ventures and/or acquisitions. We do not believe the current financial crisis will have a material adverse impact on our revenues or results of operations for at least the next twelve months.

Cost of Revenues

Cost of revenues, which consists of product and supply costs, including freight costs for the transport of pumps and supplies to and from oncology practices, and depreciation and disposals related to our infusion pumps, was $10,327,000 for the year ended December 31, 2009, a 12% increase compared to $9,191,000 for the year ended December 31, 2008. The increase was primarily related to increased revenues, as well as higher pump repair and maintenance costs, offset by lower freight costs as compared to the prior period. As a percentage of revenues, cost of revenues remained consistent at approximately 26%.

Amortization of Intangible Assets

Amortization of intangible assets for the year ended December 31, 2009 was $1,827,000, which was identical to the amount recognized for the year ended December 31, 2008. This represents the annual amortization expense associated with our Physician Relationships, which we amortize over 15 years. For more information, please refer to the discussion under “Summary of Significant Accounting Policies — Intangible Assets” included in Note 2 and “Goodwill and Intangible Assets” included in Note 5 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

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Provision for doubtful accounts

Provision for doubtful accounts for the year ended December 31, 2009 was $4,006,000, compared to $3,187,000 for the year ended December 31, 2008. The provision for doubtful accounts has increased slightly from 9% to 10% of revenues for the year ended December 31, 2009, compared to the year ended December 31, 2008. The increase, as a percentage of revenue, is directly related to a slight increase in the mix of billings directly to patients, as compared to billings to third-party payors.

Selling and Marketing Expenses

For the year ended December 31, 2009, our selling and marketing expenses were $5,258,000, compared to $4,659,000 for the year ended December 31, 2008. Selling and marketing expenses during these periods consisted of sales salaries, commissions and associated fringe benefit and payroll-related items, travel and entertainment, marketing, share-based compensation, and other miscellaneous expenses. These expenses have remained fairly consistent as a percentage of revenues, at approximately 13% for the years ended December 31, 2009 and 2008.

General and Administrative Expenses

During the year ended December 31, 2009, our general and administrative expenses were $12,218,000, compared to $11,765,000 for the year ended December 31, 2008. General and administrative expenses during these periods consisted primarily of administrative personnel (including management and officers’) salaries, fringe benefits and payroll-related items, professional fees, share-based compensation, insurance (including directors’ and officers’ insurance) and other miscellaneous expenses. The expenses in total have decreased slightly from 33% to 31% of revenues for the year ended December 31, 2009, compared to the year ended December 31, 2008. The decrease, as a percentage of revenues, for the year ended December 31, 2009 is primarily driven by a decrease in stock based compensation and a decrease in professional fees primarily related to significant efficiencies associated with the preparation and audit of our Annual Report on Form 10-K. These decreases were partially offset by the recognition of Steve Watkins’ (our former CEO) compensation and benefits in accordance with his separation agreement as described in Note 10 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

Other Income and Expenses

During the year ended December 31, 2009, we recorded a loss on derivatives of $78,000, compared to a gain of $9,815,000 during the year ended December 31, 2008. These amounts represent an unrealized (loss) gain which resulted from the change in the fair value of our warrants, combined with an unrealized gain (loss) resulting from the change in the fair value of our single interest rate swap. For more information, please refer to the discussion under “Summary of Significant Accounting Policies — Warrants and Derivative Financial Instruments” included in Note 2 and “Warrants and Derivative Financial Instruments” included in Note 6 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

During the year ended December 31, 2009, we recorded interest expense of $3,503,000, compared to $3,771,000 for the year ended December 31, 2008. These amounts consist of interest paid to Kimberly-Clark (formerly I-Flow) on our term loan, the amortization of deferred debt issuance costs incurred in conjunction with the loan, expense associated with the interest rate swap and interest expense on capital leases for ambulatory pumps. The decrease is primarily the result of a decrease in interest expense on the term loan with Kimberly-Clark (formerly I-Flow). This was the result of a decrease in the outstanding balance due to significant principal payments made during the year ended December 31, 2009. This was partially offset by higher cash payments associated with our single interest rate swap, due to the LIBOR rate being significantly lower during the year ended December 31, 2009 as compared to the year ended December 31, 2008. The decrease was also partially offset by interest expense related to new capital leases that we entered into during the year to finance the purchase of ambulatory pumps.

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During the year ended December, 2009, we recorded income tax expense of $977,000, compared to $907,000 for the year ended December 31, 2008. The effective tax rate for the year ended December 31, 2009 was 55.43%, compared to 8.34% for the year ended December 31, 2008. The effective tax rate of 55.4% for the year ended December 31, 2009, as compared to the statutory rate of 34%, is primarily driven by permanent items including the current change in the valuation allowance on net deferred tax assets, the change in the net deferred tax liability on indefinite-lived goodwill and various state tax expenses. Please refer to the discussion under “Summary of Significant Accounting Policies — Income Taxes” included in Note 2 and “Income Taxes” included in Note 8 to our Consolidated Financial Statements included in this Annual Report on Form 10-K

Inflation

Management believes that there has been no material effect on our operations or financial condition as a result of inflation or changing prices of our ambulatory infusion pumps during the period from December 31, 2008 through December 31, 2009.

InfuSystem Holdings, Inc. Results of Operations for the Fiscal Year ended December 31, 2008

Our results of operations for the year ended December 31, 2008 were not comparable with the prior period presented, as this was the first full calendar year where our results were solely and fully reflective of us as an operating company.

Our revenue for the fiscal year ended December 31, 2008 was $35,415,000. This was predominantly derived from our rental of ambulatory infusion pumps which are primarily used for continuous infusion of chemotherapy drugs for patients with colorectal cancer.

Cost of revenues for the fiscal year ended December 31, 2008 was $9,191,000. This consisted of product and supply costs, including freight costs for the transport of pumps and supplies to and from oncology practices, and depreciation on our infusion pumps.

Provision for doubtful accounts for the fiscal year ended December 31, 2008 was $3,187,000.

Amortization of our intangible assets for the fiscal year ended December 31, 2008 was $1,827,000. This represents the annual amortization expense associated with our Physician Relationships, which we are amortizing over 15 years. For more information, please refer to the discussion under “Summary of Significant Accounting Policies — Intangible Assets” included in Note 2 and “Goodwill and Intangible Assets” included in Note 5 to our Consolidated Financial Statements included in this Annual Report on Form 10-K

During the fiscal year ended December 31, 2008, our selling and marketing expenses were $4,659,000. Selling and marketing expenses during this period consisted of sales salaries, commissions, fringes and payroll-related items, travel and entertainment, marketing, stock-based compensation expense and other miscellaneous expenses.

During the fiscal year ended December 31, 2008, our general and administrative expenses were $11,765,000. General and administrative expenses during this period consisted primarily of administrative personnel (including management and officers) salaries, fringes and payroll-related items, share-based compensation expense, professional fees and other miscellaneous expenses.

During the fiscal year ended December 31, 2008, we recorded a gain on derivatives of $9,815,000. This amount represented an unrealized gain which resulted from the decline in the fair value of our warrants, offset partially by an unrealized loss as a result of the unfavorable change in the fair value of our single interest rate swap. For more information, please refer to the discussion under “Summary of Significant Accounting Policies — Warrants and Derivative Financial Instruments” included in Note 2 and “Warrants and Derivative Financial Instruments” included in Note 6 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

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During the fiscal year ended December 31, 2008, we recorded interest expense of $3,771,000. This amount consisted of interest paid to Kimberly-Clark (formerly I-Flow) on our term loan, payments made on the interest rate swap, amortization of deferred debt issuance costs incurred in conjunction with the Kimberly-Clark (formerly I-Flow) term loan and other interest expense.

During the fiscal year ended December 31, 2008, we recorded income tax expense of $907,000. This amount consisted of federal, state and local tax provisions.

InfuSystem Holdings, Inc. Results of Operations for the Fiscal Year ended December 31, 2007

Our results of operations for the year ended December 31, 2007 are not comparable with other periods presented. Effective October 25, 2007, upon our acquisition of InfuSystem, we ceased to be a development stage company and became an operating company. Substantially all activity through October 25, 2007 related to our formation, initial public offering (the “IPO”) and efforts related to the acquisition of InfuSystem.

Our revenue for the fiscal year ended December 31, 2007 was $6,582,000, which included InfuSystem revenue only for the sixty seven day period from October 26, 2007 to December 31, 2007.

Cost of revenues for the fiscal year ended December 31, 2007 was $1,620,000. This consisted of product and supply costs, including freight costs for the transport of pumps and supplies to and from oncology practices, and depreciation on our infusion pumps.

Provision for doubtful accounts for the fiscal year ended December 31, 2007 was $584,000.

Amortization of our intangible assets for the fiscal year ended December 31, 2007 was $335,000.

During the fiscal year ended December 31, 2007, our selling and marketing expenses were $649,000. Selling and marketing expenses during this period consisted of sales salaries, commissions and associated fringe benefit and payroll-related items, travel and entertainment, marketing and other miscellaneous expenses.

During the fiscal year ended December 31, 2007, our general and administrative expenses were $4,891,000. General and administrative expenses during this period consisted primarily of share-based compensation.

Liquidity and Capital Resources

As of December 31, 2009 we had cash resources of $7,750,000 compared to $11,513,000 at December 31, 2008. The decrease in cash available to us was primarily due to $8,565,000 in principal payments on our term loan with Kimberly-Clark (formerly I-Flow) and $4,612,000 in capital expenditures, partially offset by positive cash flow from operating activities.

Cash provided by operating activities for the fiscal year ended December 31, 2009 was $9,708,000, compared to cash provided by operating activities of $10,897,000 for the fiscal year ended December 31, 2008. The decrease is attributable to changes in our working capital. The most significant change in working capital timing relates to our accounts receivable increasing during fiscal year ended December 31, 2009, which was primarily the result of an increase in billings and revenue in the month of December 2009 as compared to December 2008. Cash provided by operating activities, excluding changes in assets and liabilities, improved from $12,773,000 to $14,652,000 for the fiscal year ended December 31, 2009, compared to the fiscal year ended December 31, 2008.

Cash used in investing activities for the fiscal year ended December 31, 2009 was $4,611,000, compared to $1,044,000 for the fiscal year ended December 31, 2008. The increase is due to an increase in our purchases of infusion pumps predominantly for new customer accounts, expenditures associated with moving our office facilities, and our investment in customized software which will enable us to be more efficient in our billing

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processes and eliminate the need for significant amounts of paper. In addition, we did not repeat the one time acquisition-related cash inflow of $784,000 from I-Flow which took place in the first quarter of 2008.

Cash used in financing activities for the fiscal year ended December 31, 2009 was $8,860,000, compared to $2,300,000 for the fiscal year ended December 31, 2008. The increase is primarily due to a $5,294,000 excess cash flow principal prepayment and a scheduled increase in our quarterly principal payments on the Kimberly-Clark (formerly I-Flow) term loan.

As of December 31, 2009, we had cash and cash equivalents of $7,750,000, net accounts receivable of $5,517,000 and net working capital (excluding derivative liabilities) of $6,332,000, an increase compared to net working capital (excluding derivative liabilities) of $6,098,000 as of December 31, 2008. We have included in current liabilities $1,249,000 and $5,294,000, as of December 31, 2009 and 2008, respectively, for a projected excess cash flow principal prepayment as required by the term loan Credit and Guaranty Agreement dated as of October 25, 2007 with Kimberly-Clark (formerly I-Flow) (the “Credit and Guaranty Agreement”). Management believes the current funds, together with expected cash flows from ongoing operations, are sufficient to fund our operations for at least the next 12 months. We do not believe the current global economic and financial crisis will have a material adverse impact on our liquidity for at least the next twelve months.

The Kimberly-Clark (formerly I-Flow) term loan is collateralized by substantially all of our assets and requires us to comply with covenants principally relating to satisfaction of a fixed charge coverage ratio, a leverage ratio, an annual limit on capital expenditures and minimum earnings before interest, taxes, depreciation and amortization (“EBITDA”). As of December 31, 2009, we believe we were in compliance with all such covenants, and also believe we will remain in compliance for at least the next 12 months. In addition, under the terms of the Credit and Guaranty Agreement, we are not permitted to pay any dividends or complete any business acquisitions. On October 9, 2009, Kimberly-Clark Corporation and I-Flow Corporation announced a definitive agreement whereby Kimberly-Clark would acquire I-Flow in a cash tender offer and subsequent merger. As outlined in the credit agreement for the term loan, the agreement is binding upon and inures to the benefit of the Borrower, the Guarantors, the Lender, all future holders of the Term Loan and their respective successors and assigns.

Other than customary operating expenditures and payments of principal and interest on our loan from Kimberly-Clark (formerly I-Flow), cash requirements for the fiscal year ended December 31, 2010 are expected to consist primarily of capital expenditures for new infusion pumps. Management expects capital expenditures to be in the range of $4,000,000 to $5,000,000 during 2010. We may choose to pursue alternative financing options for some of these expenditures.

Contractual Obligations

As of December 31, 2009, future payments related to contractual obligations are as follows:

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Included in the operating lease obligations are future minimum lease payments as of December 31, 2009 under a lease agreement we entered into on March 27, 2009 for a new office building. The lease commenced on July 1, 2009 and expires on June 30, 2012.

Contingent Liabilities

We do not have any contingent liabilities.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Critical Accounting Policies and Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates, assumptions and judgments that affect the amounts reported in the financial statements, including the notes thereto. We consider critical accounting policies to be those that require more significant judgments and estimates in the preparation of our consolidated financial statements, including the following: revenue recognition, which includes contractual allowances; accounts receivable and allowance for doubtful accounts; warrants and derivative financial instruments; income taxes; and goodwill valuation. Management relies on historical experience and other assumptions believed to be reasonable in making its judgment and estimates. Actual results could differ materially from those estimates.

Management believes its application of accounting policies, and the estimates inherently required therein, are reasonable. These accounting policies and estimates are periodically reevaluated, and adjustments are made when facts and circumstances dictate a change.

Our accounting policies are more fully described under the heading “Summary of Significant Accounting Policies” in Note 2 to our Consolidated Financial Statements included in this Annual Report on Form 10-K. We believe the following critical accounting estimates are the most significant to the presentation of our financial statements and require the most difficult, subjective and complex judgments:

Revenue Recognition

Our strategic focus is rental revenue in the oncology market. Revenues are recognized predominantly under fee for service arrangements through equipment that we rent to patients. We recognize revenue only when all of the following criteria are met: persuasive evidence of an arrangement exists; services have been rendered; the price to the customer is fixed or determinable; and collectability is reasonably assured. Persuasive evidence of an arrangement is determined to exist, and collectability is reasonably assured, when we receive a physician’s order and assignment of benefits, signed by the physician and patient, respectively, and we have verified actual pump usage and insurance coverage and have successfully billed the payor. We recognize rental revenue from electronic infusion pumps as earned, normally on a month-to-month basis. Pump rentals are billed at our established rates, which often differ from contractually allowable rates provided by third-party payors such as Medicare, Medicaid and commercial insurance carriers. All billings to third party payors are recorded net of provision for contractual adjustments to arrive at net revenues.

Due to the nature of the industry and the reimbursement environment in which we operate, certain estimates are required to record revenues and accounts receivable at their net realizable values. Inherent in these estimates is the risk that they will have to be revised or updated as additional information becomes available. Specifically,

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the complexity of many third-party billing arrangements and the uncertainty of reimbursement amounts for certain services from certain payors may result in adjustments to amounts originally recorded. Due to continuing changes in the health care industry and third-party reimbursement, it is possible that management’s estimates could change in the near term, which could have an impact on our results of operations and cash flows.

Our largest contracted payor is Medicare, which accounted for approximately 31% of our gross billings for the quarter ended December 31, 2009. We have contracts with various individual Blue Cross/Blue Shield affiliates which in the aggregate accounted for approximately 22% of our gross billings for the fiscal year ended December 31, 2009. No individual payor (other than Medicare and the Blue Cross/Blue Shield entities) accounts for greater than approximately 6% of our gross billings.

Accounts Receivable and Allowance for Doubtful Accounts

We have agreements with third-party payors which provide for payments at amounts different from established rates. Accounts receivable are reported at the estimated net realizable amounts from patients, third-party payors and others for services rendered. We perform periodic analyses to assess the accounts receivable balances. We record an allowance for doubtful accounts based on the estimated collectability of the accounts such that the recorded amounts reflect estimated net realizable value. Upon determination that an account is uncollectible, the account is written-off and charged to the allowance.

Substantially all of our receivables are related to providing healthcare services to patients. Accounts receivable are reduced by an allowance for amounts that could become uncollectible in the future. Our estimate for our allowance for doubtful accounts is based upon management’s assessment of historical and expected net collections by payor. Due to continuing changes in the health care industry and third-party reimbursement, it is possible that management’s estimates could change in the near term, which could have an impact on our financial position, results of operations, and cash flows.

Warrants and Derivative Financial Instruments

On April 18, 2006, we consummated an initial public offering (“IPO”) of 16,666,667 units. Each unit consisted of one share of common stock and two redeemable common stock purchase warrants. Each warrant entitles the holder to purchase from us one share of our common stock at an exercise price of $5.00. On May 18, 2006, we sold an additional 208,584 units to FTN Midwest Securities Corp., the underwriter of our IPO (“FTN Midwest”), pursuant to a partial exercise by FTN Midwest of its overallotment option. The Warrant Agreement provides for us to register the shares underlying the warrants in the absence of our ability to deliver registered shares to the warrant holders upon warrant exercise.

In September 2000, the Emerging Issues Task Force issued ASC 815 (formerly EITF 00-19, Accounting for Derivative Financial Instruments Indexed to and Potentially Settled in, a Company’s Own Stock), which requires freestanding derivative contracts that are settled in a company’s own stock, including common stock warrants, to be designated as equity instruments, assets or liabilities. Under the provisions of this standard, a contract designated as an asset or a liability must be carried at its fair value on a company’s balance sheet, with any changes in fair value recorded in our results of operations. A contract designated as an equity instrument must be included within equity, and no fair value adjustments are required from period to period.

In accordance with ASC 815, the 33,750,502 warrants issued in connection with the IPO and overallotment to purchase common stock must be settled in registered shares and are separately accounted for as liabilities as discussed in Note 6 to our Consolidated Financial Statements. The fair value of these warrants is shown on our balance sheet and the unrealized changes in the value of these warrants are shown in our statement of operations as “(Loss) gain on derivatives.” These warrants are freely traded on the “Over the Counter Bulletin Board.” Consequently, the fair value of these warrants is estimated as the market price of the warrant at each period end. To the extent the market price increases or decreases, our warrant liabilities will also increase or decrease with a corresponding impact on our results of operations within “(Loss) gain on derivatives”.

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Sales of warrants that can be settled in unregistered shares of common stock, as discussed in Note 10 to our Consolidated Financial Statements, are treated as equity and included in additional paid in capital. The total warrants issued to date that can be settled in unregistered shares of common stock are 1,357,717 at an issue price of $.70 per warrant or a total issue price of $950,000.

ASC 815 (formerly SFAS No. 133, Accounting for Derivative Instruments and Hedging Activities), requires that an entity recognize all derivatives as either assets or liabilities in the statement of financial position and measure those instruments at fair value.

In December 2007, we entered into a single interest rate swap to hedge the exposure associated with our floating rate debt. We have elected not to designate the swap as a cash flow hedge, in accordance with ASC 815. The fair value of the swap is therefore shown on our balance sheet and the unrealized changes in the value of the swap are shown in our statement of operations within “(Loss) gain on derivatives”.

Income Taxes

We account for income taxes in accordance with ASC 740 (formerly SFAS No. 109, Accounting for Income Taxes), which requires that we recognize deferred tax liabilities and assets based on the differences between the financial statement carrying amounts and the tax basis of assets and liabilities, using enacted tax rates in effect in the years the differences are expected to reverse. Deferred income tax benefit (expense) results from the change in net deferred tax assets or deferred tax liabilities. A valuation allowance is recorded when, in the opinion of management, it is more likely than not that some or all of any deferred tax assets will not be realized. For more information, please refer to the “Income Taxes” discussion included in Note 8 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

Goodwill Valuation

Goodwill arising from business combinations represents the excess of the purchase price over the estimated fair value of the net assets of the businesses acquired.

In accordance with the provisions of ASC 350 (formerly SFAS No. 142, Goodwill and Other Intangible Assets), goodwill is tested annually for impairment or more frequently if circumstances indicate the possibility of impairment. Significant judgments required to estimate fair value include estimating future cash flows, and determining appropriate discount rates, growth rates and other assumptions. Changes in these estimates and assumptions could materially affect the determination of fair value which could trigger impairment. We performed the annual impairment test at October 31, 2009, and determined there was no impairment of goodwill. No events have occurred subsequent to October 31, 2009 that indicates impairment may have occurred. For more information, please refer to the “Goodwill and Intangible Assets” discussion included in Note 5 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

Recently Issued Accounting Pronouncements

In December 2007, the FASB issued ASC 805 (formerly SFAS No. 141(R), Business Combinations). This statement retains the fundamental requirements of the original pronouncement requiring that the acquisition method of accounting, or purchase method, be used for all business combinations. This standard requires, among other things, expensing of acquisition related and restructuring related costs, measurement of pre-acquisition contingencies at fair value, measurement of equity securities issued for purchase at the date of close of the transaction and capitalization of in process research and development, all of which represent modifications to current accounting for business combinations. This standard is effective for fiscal years beginning after December 15, 2008. We adopted this standard effective January 1, 2009, and it did not have an impact on our consolidated financial position, results of operations or cash flows.

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In May 2009, the FASB issued ASC 855 (formerly SFAS No. 165, Subsequent Events). This statement establishes general standards of accounting for, and requires disclosure of, events that occur after the balance sheet date but before financial statements are issued or are available to be issued. The new standard also requires disclosure of the date through which subsequent events have been evaluated. We adopted the provisions of this standard effective June 15, 2009. Please refer to the subsequent events footnote included in note 14 to our Consolidated Financial Statements included in this Annual Report on Form 10-K.

In June 2009, the FASB issued ASC 105 (formerly SFAS No. 168, The FASB Accounting Standards Codification^™ and the Hierarchy of Generally Accepted Accounting Principles, a replacement of FASB Statement No. 162). This statement establishes the FASB Accounting Standards Codification^™ (“Codification”) as the source of authoritative U.S. generally accepted accounting principles (“GAAP”) recognized by the FASB to be applied by nongovernmental entities in the preparation of financial statements. This statement is effective for financial statements issued for interim periods and annual periods ending after September 15, 2009. This standard did not have a material impact on our consolidated financial position, results of operations or cash flows.

We are exposed to interest rate fluctuations on our underlying variable rate long-term debt. We utilize an interest rate swap agreement to moderate the majority of such exposure. We do not use derivative financial instruments for trading or other speculative purposes.

At December 31, 2009, the principal plus accrued interest on our term loan with Kimberly-Clark (formerly I-Flow) was $21,685,000. The term loan bears interest at LIBOR (subject to a 3% floor) plus 5.5% or Prime (subject to a 4% floor) plus 4.5%, at our option. The loan is a variable rate loan and therefore fair value approximates book value. Please see the heading “Debt and other Long-term Obligations” under Note 7 to our Consolidated Financial Statements included in this Annual Report on Form 10-K for a further discussion of our term loan with Kimberly-Clark (formerly I-Flow).

At December 31, 2009, we had one interest rate swap agreement in effect to fix our LIBOR-based variable rate debt. The interest rate swap agreement, which expires in December 2010, had a notional value of $16,500,000 on December 31, 2009 and a fixed rate of 4.29%.

Based on the term loan outstanding and the swap agreement in place at December 31, 2009, a decrease in LIBOR to zero (which is less than a 100 basis point decrease) would have decreased our cash flow and pretax earnings for the fiscal year ended December 31, 2009 by approximately $63,000, while a 100 basis point increase in LIBOR would have increased our cash flow and pretax earnings for the fiscal year ended December 31, 2009 by approximately $180,000. The results of this sensitivity analysis are entirely attributable to our single interest rate swap, as changes of this magnitude to the LIBOR rate would have had no impact on our interest payments on the term loan, as they would have still resulted in a rate below the 3% LIBOR floor.

We have classified certain warrants as derivative liabilities, which resulted in a liability of $2,025,000 at December 31, 2009. We classified the warrants as derivative liabilities because there is a possibility that we may be required to settle the warrants in registered shares of common stock, and therefore, it is assumed that the company will be required to net-cash settle the contract. We are required to compare the fair market value of these instruments from the date of the initial recording to their fair market value as of the end of each reporting period and to reflect the change in fair market value in our Consolidated Statements of Operations as a gain or loss for the applicable period.

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Index to Financial Statements

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of

InfuSystem Holdings, Inc.

We have audited the accompanying consolidated balance sheets of InfuSystem Holdings, Inc. and Subsidiary (the “Company”) as of December 31, 2009 and 2008, and the related consolidated statements of operations, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2009. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of InfuSystem Holdings, Inc. and subsidiary as of December 31, 2009 and 2008, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2009, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’s internal control over financial reporting as of December 31, 2009, based on the criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 3, 2010 expressed an unqualified opinion on the Company’s internal control over financial reporting.

As discussed in Note 1 to the consolidated financial statements, prior to October 25, 2007, the Company was in the development stage.

/S/ DELOITTE & TOUCHE LLP

Detroit, Michigan

March 3, 2010

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INFUSYSTEM HOLDINGS, INC. AND SUBSIDIARY

(formerly HAPC, INC.)

CONSOLIDATED BALANCE SHEETS

See accompanying notes to consolidated financial statements.

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INFUSYSTEM HOLDINGS, INC. AND SUBSIDIARY

(formerly HAPC, INC.)

CONSOLIDATED STATEMENTS OF OPERATIONS

See accompanying notes to consolidated financial statements.

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INFUSYSTEM HOLDINGS, INC. AND SUBSIDIARY

(formerly HAPC, INC.)

CONSOLIDATED STATEMENTS OF

STOCKHOLDERS’ EQUITY

See accompanying notes to consolidated financial statements.

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INFUSYSTEM HOLDINGS, INC. AND SUBSIDIARY

(formerly HAPC, INC.)

CONSOLIDATED STATEMENTS OF CASH FLOWS

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The following table presents certain supplementary cash flow information for the years ended December 31, 2009, 2008 and 2007: