CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
TOTAL REVENUES	$ 209,527	$ 160,549	$ 412,622	$ 303,681
OPERATING EXPENSES
Center costs, excluding depreciation and amortization shown separately below	149,697	109,341	298,590	208,475
General and administrative expenses	103,559	85,479	206,928	118,130
Depreciation and amortization	16,743	12,774	32,427	25,002
Total operating expenses	269,999	207,594	537,945	351,607
LOSS FROM OPERATIONS	(60,472)	(47,045)	(125,323)	(47,926)
OTHER EXPENSE
Loss on remeasurement of contingent consideration	(180)	(250)	(614)	(557)
Transaction costs	(19)	(1,996)	(297)	(3,530)
Interest expense	(7,133)	(23,174)	(10,574)	(31,806)
Other expense	0	(1,356)	0	(1,445)
Total other expense	(7,332)	(26,776)	(11,485)	(37,338)
LOSS BEFORE INCOME TAXES	(67,804)	(73,821)	(136,808)	(85,264)
INCOME TAX (PROVISION) BENEFIT	(923)	3,788	5,753	6,549
NET LOSS	(68,727)	(70,033)	(131,055)	(78,715)
Accretion of redeemable class A units	0	0	0	(36,750)
NET LOSS AVAILABLE TO COMMON STOCKHOLDERS/MEMBERS	$ (68,727)	$ (70,033)	$ (131,055)	$ (115,465)
Net loss per share, basic	$ (0.19)	$ (0.22)	$ (0.37)	$ (0.37)
Net loss per share, diluted	$ (0.19)	$ (0.22)	$ (0.37)	$ (0.37)
Weighted-average shares used to compute basic and diluted net loss per share	353,729	313,536	352,297	309,559