CARC/RARC Lookup

Search Claim Adjustment Reason Codes (CARC, e.g. “16”) and Remittance Advice Remark Codes (RARC, e.g. “M1”). Each result includes an original plain-English description — expand a row for common causes and how to resolve it.

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CARC codes maintained by X12 (x12.org). Descriptions on this site are original reference interpretations. RARC codes maintained by CMS.