Remittance advice remark code
Remark code N479 meaning
RARC N479: The explanation of benefits from coordination of benefits or Medicare Secondary Payer is missing.
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- Remark code
- RARC N479
- Short name
- Primary payer's explanation of benefits missing
- Plain meaning
- The explanation of benefits from coordination of benefits or Medicare Secondary Payer is missing.
- Kind
- Adds detail to the reason code on the same line.
Plain-English summary written by Rivvi. X12 owns the RARC list and its exact wording, which is not reproduced here. Read it on the X12 RARC list (list dated July 1, 2026, checked October 23, 2026). This page does not decide how a claim is paid.
What to check before resubmitting
- Attach the primary payer's EOB or remittance, or send its data in the claim.
Reason codes it often comes with
Related remark codes
Related pages
Questions
What does remark code N479 mean?
The explanation of benefits from coordination of benefits or Medicare Secondary Payer is missing. This is Rivvi's plain-English summary of RARC N479. X12's exact wording is on x12.org.
What should I do about N479?
Attach the primary payer's EOB or remittance, or send its data in the claim.
Is N479 a denial?
A remark code adds detail to the reason code on the same line. The reason code (CARC) and its group code decide what was denied or adjusted. It is often paired with reason codes 16, 22.
What is the difference between a RARC and a CARC?
A remittance advice remark code (RARC) adds detail to a claim adjustment reason code (CARC). The CARC says why the line was adjusted. The RARC often says what to fix.