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SIGNIFICANT ACCOUNTING POLICIES (Details - Revenue) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Revenue from External Customer [Line Items] |  |
Total revenue | $ 271,549 | $ 231,392
Commercial insurance |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 151,678 | 126,225
Medicare |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 54,199 | 44,076
Medicaid |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 7,120 | 6,048
Workers' compensation/personal injury |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 11,027 | 8,431
Other patient revenue |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 5,835 | 5,606
Management fee revenue |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 2,117 | 3,677
Teleradiology and Software revenue |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 4,386 | 3,816
Other |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 6,310 | 6,289
Service fee revenue |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | 242,672 | 204,168
Revenue under capitation arrangements |  |
Revenue from External Customer [Line Items] |  |
Service fee revenue, net of contractual allowances and discounts | $ 28,877 | $ 27,224

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