Remark Code N479 on Your EOB — Meaning & What to Do

Remittance Advice Remark Code (RARC)

What remark code N479 means: The Explanation of Benefits from the primary insurer is missing.
What to do about remark code N479: Provide the primary insurer's EOB to the provider.

Remark codes add detail to a claim decision. They appear alongside the main adjustment codes on your Explanation of Benefits or remittance notice, giving the specific reason behind remark code N479.

Seeing remark code N479 on your EOB?
A denial code tells you what the payer reported, but it may not tell the whole story. Reviewing your EOB and bill together can help clarify what may need attention.

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Related codes

RARC N522This is a duplicate of a service already submitted. RARC N1You may be able to appeal this decision — see your plan's appeal rights. RARC M15Separately billed services are included in the main service's payment. RARC N4Missing or incomplete information about other insurance is holding up the claim.

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Frequently asked questions about Remark code N479

What does remark code N479 mean on my EOB?

The Explanation of Benefits from the primary insurer is missing.

What should I do about remark code N479?

Provide the primary insurer's EOB to the provider.

Seeing this code on your own EOB?
Upload the EOB, the bill, or both — MD Bill Check reads the codes on your documents, compares them side by side, and flags what's worth questioning. Free, no account needed.

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Last reviewed 2026-07-07 · MDBillCheck Editorial Team. Plain-English explanations are original wording; always verify the specific reason with your insurer.