23.	Concentrations

Approximately 67%, 66% and 66% of total U.S. dialysis and related lab services net revenues in 2014, 2013 and 2012, respectively, are from government-based programs, principally Medicare and Medicaid. Related accounts receivable and other receivables from Medicare, including Medicare-assigned plans, and Medicaid, including Medicaid-assigned plans, were approximately $705,532 and $679,006, as of December 31, 2014 and 2013, respectively.

Approximately 71% and 69% of HCP’s revenues in 2014 and 2013, respectively, are from government-based programs, principally Medicare and Medicaid. Approximately 64% and 67% for 2014 and 2013, respectively, of HCP’s capitated and patient services revenues (medical revenues) are associated with three health plans. In addition, approximately 73% and 69% at December 31, 2014 and 2013, respectively, of HCP’s accounts receivables are associated with three health plans.

There is no single payor that accounted for more than 10% of total consolidated accounts receivable at December 31, 2014 and 2013.

EPO is a significant physician-prescribed pharmaceutical that is administered during dialysis and is provided by a sole supplier, Amgen. The amount of EPO that is separately billable accounted for approximately 2% of U.S. dialysis and related lab services net revenues in 2014 and 2013. As long as certain conditions are met by the Company, the agreement with Amgen limits their ability to unilaterally decide to increase the price it charges the Company for EPO. See Note 18 of the consolidated financial statements for further details.