RARC Code Directory
Remittance Advice Remark Codes
RARCs provide additional explanation alongside CARC codes on remittance advice. Learn what they mean, why they appear, and what to do next.
Quick Answer
RARC (Remittance Advice Remark Code) codes provide supplemental explanation alongside CARC codes on remittance advice. While CARC codes explain the category of adjustment, RARC codes identify the specific issue — which field is missing, what documentation is needed, or what rule was violated. RARC codes begin with M (Medicare-specific), N (general), or MA (Medicare alerts).
Key Takeaways
RARC codes provide specific detail that CARC codes do not.
Always read RARC codes alongside CARC codes for full context.
M codes are Medicare-specific remark codes.
N codes are general remark codes used by all payers.
MA codes are Medicare alert codes that notify providers of appeal rights or other actions.
Step-by-Step
Find the RARC code on the ERA/EOB
RARC codes appear alongside CARC codes in the remark segment of the remittance advice. Multiple RARC codes may appear for a single claim.
Cross-reference the RARC with the CARC
The CARC tells you the category (e.g., CO-16 = missing information); the RARC tells you the specific field (e.g., M51 = missing procedure code).
Take the recommended action
Each RARC code has recommended next steps. Follow the steps to correct, resubmit, or appeal the claim.
Common Mistakes
Ignoring RARC codes and only reading the CARC — you will miss critical detail.
Not understanding the difference between M, N, and MA codes.
Treating MA (alert) codes as denial reasons — they are informational.
FAQ
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