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BILL ADJUSTMENT REASON CODE. Definition: Codes indicating detailed reason an adjustment was made at the bill level. Revised: 09/26/98 . Business Need: Required in order to access the appropriateness of the adjustment or the basis of the adjustment being made. Source: Payor . Format: ANSI ID 1/5 IAIABC ID 3 . Values: See Appendix – A139 . Max ... ................
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