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REVENUE RECOGNITION (Tables) | 12 Months Ended
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Dec. 31, 2018
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, |
| 2018 |  | 2017 |  | 2016 |
Healthcare insurers: |  |  |  |  |  |
Fee-for-service | 32 | % |  | 34 | % |  | 34 | % |
Capitated | 3 |  |  | 3 |  |  | 4 |  |
Total healthcare insurers | 35 |  |  | 37 |  |  | 38 |  |
Government payers | 16 |  |  | 17 |  |  | 17 |  |
Client payers | 32 |  |  | 30 |  |  | 29 |  |
Patient | 13 |  |  | 12 |  |  | 11 |  |
Total DIS | 96 |  |  | 96 |  |  | 95 |  |
DS | 4 |  |  | 4 |  |  | 5 |  |
Net revenues | 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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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