X12 CARC & RARC Denial Hub
Every current X12 Claim Adjustment Reason Code and Remittance Advice Remark Code with its official x12.org definition, plus a code-specific playbook: why it happens, how to resolve it, what to send, and how to prevent it. Deactivated codes are listed with their stop dates.
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CO-4
CO-16
CO-18
CO-29
CO-50
CO-97
CO-197
PR-1
N65
MA04
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Denial Code Analysis
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Code text references the X12 CARC/RARC lists. Always confirm the latest official WPC wording for payer-specific adjudication.