REVENUE RECOGNITION (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The approximate percentage of net revenues by type of payer customer was as follows:

	Year Ended December 31,
	2023		2022		2021
Healthcare insurers:
Fee-for-service	37	%	38	%	39	%
Capitated	3		3		3
Total healthcare insurers	40		41		42
Government payers	11		11		10
Client payers	34		33		33
Patients (including coinsurance and deductible responsibilities)	12		12		12
Total DIS	97		97		97
DS	3		3		3
Net revenues	100	%	100	%	100	%

Accounts Receivable Disaggregation

The approximate percentage of net accounts receivable by type of payer customer as of December 31, 2023 and 2022 was as follows:

	2023	2022
Healthcare insurers	24%	28%
Government payers	7	6
Client payers	45	44
Patients (including coinsurance and deductible responsibilities)	20	18
Total DIS	96	96
DS	4	4
Net accounts receivable	100%	100%

Accounts Receivable, Allowance for Credit Loss

The following table summarizes the activity for the Company's allowance for credit losses during the years ended December 31, 2023 and 2022, which principally relates to client payers:

	Allowance for Credit Losses
Balance, December 31, 2021	$	31
Provision for credit losses	3
Write-offs of accounts receivable, net of recoveries	(4)
Balance, December 31, 2022	30
Provision for credit losses	1
Write-offs of accounts receivable, net of recoveries	(4)
Balance, December 31, 2023	$	27