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N515 Remark Code (Deactivated): Submit to Other Insurer

N515 was an alert telling the provider to send the claim to the patient's other insurer for possible supplemental benefits, because the payer had not forwarded it. X12 deactivated it, and its official text says to use N387 instead.

X12 deactivated RARCN515 on October 1, 2009. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals. Use N387 instead.

Code: N515 (RARC N515)
Status: Deactivated StoppedOctober 1, 2009 (in use since November 1, 2008).
Code set: Remittance Advice Remark Codes (RARC)
Group codes: PR (Patient Responsibility): Often appeared where a patient balance remained that supplemental coverage might pay.
CO (Contractual Obligation): Could also accompany CO lines, since the alert concerned billing the next payer, not the adjustment itself.
Official description: Alert: Submit this claim to the patient's other insurer for potential payment of supplemental benefits. We did not forward the claim information. (use N387 instead)
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What N515 meant

Remark N515 was an alert, not a denial. The primary payer finished processing and wanted the provider to know that the patient’s other insurance might pay supplemental benefits. It also made clear that the primary had not sent the claim on, so the provider needed to submit it.

What replaced it

The official text says to use N387 instead. N387 is active and carries the same instruction. When you bill the other insurer, it will look at the primary’s processing, reported as OA-23, and may reject the claim with N4 if the primary’s remittance is missing.

If you still see N515

It was active for only a short time. For any claim with this alert or N387, bill the supplemental or secondary payer promptly with the primary’s payment details, then bill the patient only for what remains after that payer processes the claim.

N387 (Alert: Submit this claim to the patient's other insurer for potential payment of supplemental benefits.): The direct replacement named in the official text, with the same message.
OA-23 (The impact of prior payer(s) adjudication including payments and/or adjustments. (Use only with Group Code OA)): Impact of prior payer adjudication, which the supplemental payer will see on the next claim.
N4 (Missing/Incomplete/Invalid prior Insurance Carrier(s)): Missing or invalid prior insurance carrier EOB, a common rejection if the primary's remittance is not included.

N515 FAQ

What is supplemental coverage?

Insurance that pays some or all of the patient's remaining costs after the primary plan, such as a Medigap policy or a secondary employer plan.

Why did the payer not forward the claim?

Automatic crossover to supplemental insurers only happens in certain arrangements. When it does not, the provider has to bill the other insurer directly.

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