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Organization and Summary of Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The following table presents a summary of revenues by service type as a percentage of total revenues:


	Year Ended December 31,
	2023		2022		2021
Patient service revenues:
Surgical facilities revenues	96.0	%	95.8	%	95.7	%
Ancillary services revenues	2.4	%	2.7	%	3.0	%
Total patient service revenues	98.4	%	98.5	%	98.7	%
Other service revenues	1.6	%	1.5	%	1.3	%
Total revenues	100.0	%	100.0	%	100.0	%

The following table sets forth patient service revenues by type of payor and as a percentage of total patient service revenues for the Company's consolidated surgical facilities (dollars in millions):


	Year Ended December 31,
	2023				2022				2021
	Amount		%		Amount		%		Amount		%
Patient service revenues:
Private insurance	$	1,418.6	52.5	%	$	1,288.0	51.5	%	$	1,110.1	50.6	%
Government	1,128.1		41.8	%	1,059.2		42.3	%	949.9		43.3	%
Self-pay	68.1		2.5	%	65.9		2.6	%	61.1		2.8	%
Other (1)	85.6		3.2	%	89.0		3.6	%	73.9		3.3	%
Total patient service revenues	2,700.4		100.0	%	2,502.1		100.0	%	2,195.0		100.0	%
Other service revenues (2)	42.9				37.2				30.1
Total revenues	$	2,743.3			$	2,539.3			$	2,225.1

(1)Other is comprised of anesthesia service agreements, automobile liability, letters of protection and other payor types.

(2)Includes amounts attributable to related parties of $18.4 million, $15.7 million and $9.3 million for the years ended December 31, 2023, 2022 and 2021, respectively.

Schedule of Rollforward of Non-Controlling Interests - Redeemable

A summary of activity related to redeemable non-controlling interests for the years ended December 31, 2023 and 2022 is as follows (in millions):


	December 31,
	2023		2022

Balance at beginning of period	$	342.0	$	330.2
Net income attributable to non-controlling interests—redeemable	37.8		44.5
Acquisition and disposal of shares of non-controlling interests, net—redeemable	(9.3)		10.4
Distributions to non-controlling interest —redeemable holders	(43.1)		(43.1)
Balance at end of period	$	327.4	$	342.0

Schedule of Carrying Amounts and Fair Values of Long-Term Debt

A summary of the carrying amounts and estimated fair values of the Company's long-term debt follows (in millions):


	Carrying Amount				Fair Value
	December 31,				December 31,
	2023		2022		2023		2022

Senior secured term loan	$	1,398.4	$	1,370.0	$	1,401.9	$	1,359.7
6.750% senior unsecured notes due 2025	$	185.0	$	185.0	$	183.2	$	183.4
10.000% senior unsecured notes due 2027	$	320.0	$	320.0	$	321.2	$	326.8