Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Patient care service revenue by source

The composition of patient care service revenue by payment source is as follows:

	Year Ended December 31,
Percentage of Revenues by Payor:	2019		2018		2017
Medicare and Medicare Advantage	68	%	66	%	61	%
Commercial and other (1)	27	%	30	%	35	%
Medicaid and Managed Medicaid	4	%	4	%	3	%
Other (2)	1	%	—	%	1	%
	100	%	100	%	100	%

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(1) Principally commercial insurance companies and also includes the VA.

(2)

Other payments of revenues by payor include hospitals and patient self-pay. Patient self-pay revenues consist of payments received directly from patients who are either uninsured or self-pay a portion of the bill.

Schedule of property, plant and equipment

Property and equipment acquired as part of an acquisition are recorded at fair value and other purchases are stated at cost with depreciation calculated using the straight‑line method over their estimated useful lives as follows:

Buildings	39 years
Leasehold improvements	Shorter of lease term or useful lives
Equipment and information systems	3 to 10 years