Medical equipment consisted of the following as of June 30, 2014 and December 31, 2013 (in thousands):

Depreciation expense for medical equipment for the three and six months ended June 30, 2014 was $0.8 million and $1.5 million, respectively compared to $1.3 million and $2.4 million for the same prior year periods, which was recorded in cost of revenues – pump depreciation and disposals, respectively.

During the first quarter of 2014, the Company reassessed the estimated useful life of certain of its property and equipment. As a result, the estimated useful life of the Company’s medical equipment was changed from five to seven years due to the determination that the Company was using these assets longer than originally anticipated. A major factor in this change was the servicing of such equipment by the Company’s Kansas facility, which was acquired in 2010. As a result, disposal of such equipment has decreased significantly since that acquisition.

The change in the estimated useful lives of the Company’s pump equipment was accounted for as a change in accounting estimate, on a prospective basis, effective January 1, 2014. The change in estimated useful lives resulted in $0.5 million and $1.0 million in less depreciation expense for the three and six months ended June 30, 2014, respectively, than otherwise would have been recorded. After-tax impact to net income would have been lower by $0.3 million and $0.6 million for the three months and six months ended June 30, 2014 if this change in estimate had not been made. There was no impact to the basic or diluted income per share due to this change in estimate.

Depreciation expense for property and equipment for the three and six months ended June 30, 2014 was $0.1 million and $0.2 million, respectively, consistent with the same prior year periods. This expense was recorded in general and administrative expenses.

At December 31, 2013, Medical equipment held for sale or rental included approximately $0.8 million of pre-owned equipment received from a financial institution when such equipment came off lease. Under the Company’s former arrangement with the financial institution, the Company did not pay for the equipment until it was sold. The liability for this equipment was included in other current liabilities for a similar amount. The Company assumed risk of loss and accounted for the disposition of such equipment as a sale. In June 2014, the Company bought out the remaining equipment from the financial institution for $0.5 million and payment was made in July 2014. As such, the Company no longer has any liabilities pertaining to this transaction.