Selected Quarterly Financial Information - Summary of Company's Selected Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 1,994,640	$ 1,972,021	$ 1,911,191
Practice salaries and benefits	1,448,275	1,383,319	1,297,477
Practice supplies and other operating expenses	124,800	121,669	100,472
General and administrative expenses	227,542	231,397	263,357
Gain on sale of building	0	0	(7,280)
Depreciation and amortization	36,171	35,636	32,147
Transformational and restructuring related expenses	2,219	27,312	22,100
Total operating expenses	1,987,319	1,799,333	1,708,273
Income from operations	7,321	172,688	202,918
Investment and other (expense) income	4,338	3,671	13,652
Interest expense	(42,075)	(39,695)	(68,722)
Loss on early extinguishment of debt	0	(57,016)	(14,532)
Equity in earnings of unconsolidated affiliates	2,057	1,722	1,912
Total non-operating expenses	(55,680)	(91,318)	(67,690)
(Loss) income from continuing operations before income taxes	(48,359)	81,370	135,228
Income tax benefit (provision)	(12,049)	(18,806)	(27,241)
(Loss) income from continuing operations	(60,408)	62,564	107,987
(Loss) income from discontinued operations, net of tax	0	3,767	22,950
Net (loss) income	(60,408)	66,331	130,937
Net (loss) income attributable to Pediatrix Medical Group, Inc.	$ (60,408)	$ 66,335	$ 130,964
Income from continuing operations, Basic	$ 0.73	$ 0.75	$ 1.27
Income from continuing operations, Diluted	0.73	0.74	1.26
Loss from discontinued operations, Basic	0	0.04	0.27
Loss from discontinued operations, Diluted	0	0.05	0.27
Earnings Per Share, Basic	0.73	0.79	1.54
Earnings Per Share, Diluted	$ 0.73	$ 0.79	$ 1.53
Weighted Average Number of Shares Outstanding, Basic	82,201	83,467	84,832
Weighted average shares, Diluted	82,201	84,121	85,828