Concentrations	12 Months Ended
Dec. 31, 2017
Risks and Uncertainties [Abstract]
Concentrations	Concentrations Approximately 67%, 64% and 66% of total U.S. dialysis services revenues in 2017, 2016 and 2015, respectively, are from government-based programs, principally Medicare and Medicaid. Related net accounts receivable and other receivables from Medicare, including Medicare-assigned plans, and Medicaid, including Managed Medicaid plans, were approximately $869,083 and $831,445, as of December 31, 2017 and 2016, respectively. There is no single commercial payor that accounted for more than 10% of total consolidated accounts receivable or consolidated net revenues at December 31, 2017 and 2016.

Concentrations

12 Months Ended

Dec. 31, 2017

Approximately 67%, 64% and 66% of total U.S. dialysis services revenues in 2017, 2016 and 2015, respectively, are from government-based programs, principally Medicare and Medicaid. Related net accounts receivable and other receivables from Medicare, including Medicare-assigned plans, and Medicaid, including Managed Medicaid plans, were approximately $869,083 and $831,445, as of December 31, 2017 and 2016, respectively.

There is no single commercial payor that accounted for more than 10% of total consolidated accounts receivable or consolidated net revenues at December 31, 2017 and 2016.