Remark Code N56 on Your EOB — Meaning & What to Do

Remittance Advice Remark Code (RARC)

What remark code N56 means: The procedure code billed was not correct for the service described.
What to do about remark code N56: Ask the provider's billing office to explain or correct this, and resubmit if needed.

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 N56.

Seeing remark code N56 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 N19A dependent procedure code was billed without its required primary code. RARC N65The procedure or service isn't payable in this place of service. RARC N4Missing or incomplete information about other insurance is holding up the claim. RARC N88This service is included in the payment for the main procedure.

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Frequently asked questions about Remark code N56

What does remark code N56 mean on my EOB?

The procedure code billed was not correct for the service described.

What should I do about remark code N56?

Ask the provider's billing office to explain or correct this, and resubmit if needed.

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.