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REVENUE RECOGNITION (Tables)
 12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue The approximate percentage of net revenues by type of customer was as follows:
Year Ended December 31,
202220212020
Healthcare insurers:
Fee-for-service38 %39 %34 %
Capitated3 3 3 
Total healthcare insurers41 42 37 
Government payers11 10 11 
Client payers33 33 38 
Patients (including coinsurance and deductible responsibilities)12 12 11 
Total DIS97 97 97 
DS3 3 3 
Net revenues100 %100 %100 %
Accounts Receivable Disaggregation The approximate percentage of net accounts receivable by type of customer as of December 31, 2022 and 2021 was as follows:
20222021
Healthcare insurers28%32%
Government payers66
Client payers4438
Patients (including coinsurance and deductible responsibilities)1821
Total DIS9697
DS43
Net accounts receivable100%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, 2022 and 2021, which principally relates to client payers:
Allowance for Credit Losses
Balance, December 31, 2020$28 
Provision for credit losses4
Write-offs of accounts receivable, net of recoveries(1)
Balance, December 31, 202131 
Provision for credit losses3 
Write-offs of accounts receivable, net of recoveries(4)
Balance, December 31, 2022
$30