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REVENUE RECOGNITION (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The approximate percentage of net revenue by type of customer was as follows:
| Twelve Months Ended December 31,
| 2019 |  | 2018 |  | 2017
Healthcare insurers: |  |  |  |  |
Fee-for-service | 33 | % |  | 32 | % |  | 34 | %
Capitated | 3 |  |  | 3 |  |  | 3 |
Total healthcare insurers | 36 |  |  | 35 |  |  | 37 |
Government payers | 15 |  |  | 16 |  |  | 17 |
Client payers | 32 |  |  | 32 |  |  | 30 |
Patients | 13 |  |  | 13 |  |  | 12 |
Total DIS | 96 |  |  | 96 |  |  | 96 |
DS | 4 |  |  | 4 |  |  | 4 |
Net revenues | 100 | % |  | 100 | % |  | 100 | %
Accounts Receivable Disaggregation | The approximate percentage of net accounts receivable by type of customer as of December 31, 2019 and 2018 was as follows:
| 2019 |  | 2018
Healthcare Insurers | 22% |  | 22%
Government Payers | 11 |  | 13
Client Payers | 42 |  | 41
Patients (including coinsurance and deductible responsibilities) | 20 |  | 20
Total DIS | 95 |  | 96
DS | 5 |  | 4
Net accounts receivable | 100% |  | 100%

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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