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REVENUE RECOGNITION (Tables) | 6 Months Ended
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Jun. 30, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The approximate percentage of net revenue by type of customer was as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018 |
Healthcare insurers: |  |  |  |  |  |  |  |
Fee-for-service | 32 | % |  | 32 | % |  | 33 | % |  | 32 | % |
Capitated | 3 |  |  | 4 |  |  | 3 |  |  | 4 |  |
Total healthcare insurers | 35 |  |  | 36 |  |  | 36 |  |  | 36 |  |
Government payers | 15 |  |  | 16 |  |  | 15 |  |  | 16 |  |
Client payers | 32 |  |  | 31 |  |  | 32 |  |  | 31 |  |
Patients | 14 |  |  | 13 |  |  | 13 |  |  | 13 |  |
Total DIS | 96 |  |  | 96 |  |  | 96 |  |  | 96 |  |
DS | 4 |  |  | 4 |  |  | 4 |  |  | 4 |  |
Net revenues | 100 | % |  | 100 | % |  | 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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