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2. SUMMARY OF ACCOUNTING POLICIES (Details - Summary of net revenue) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Commercial Insurance | [1] |  |  |  |  |  |  |  |  | $ 539,793 | $ 486,489 | $ 437,525
Medicare |  |  |  |  |  |  |  |  |  | 187,941 | 168,545 | 159,562
Medicaid |  |  |  |  |  |  |  |  |  | 28,170 | 23,948 | 24,499
Workers Compensation/Personal Injury |  |  |  |  |  |  |  |  |  | 36,548 | 32,728 | 30,543
Other | [2] |  |  |  |  |  |  |  |  | 29,135 | 35,046 | 18,007
Service fee revenue, net of contractual allowances and discounts |  |  |  |  |  |  |  |  |  | 821,587 | 746,756 | 670,136
Provision for bad debts |  |  |  |  |  |  |  |  |  | (45,387) | (36,033) | (29,807)
Net service fee revenue |  |  |  |  |  |  |  |  |  | 776,200 | 710,723 | 640,329
Revenue under capitation arrangements |  |  |  |  |  |  |  |  |  | 108,335 | 98,905 | 77,240
Total net revenue |  | $ 224,939 | $ 224,643 | $ 218,565 | $ 216,388 | $ 215,706 | $ 208,366 | $ 204,289 | $ 181,267 | $ 884,535 | $ 809,628 | $ 717,569
[1] | 21% of our net service fees revenue for the year ended December 31, 2016 and 20% for the years ended December 31, 2015 and 2014 were earned from a single payor.
[2] | Other consists of revenue from teleradiology services, consulting fees and software revenue.

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- Definition Amount of revenue recognized based on fees charged on a per capita basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 605 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=68054470&loc=d3e8200-115640 + Details
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