N517 remark code

Remittance advice remark code N517. Remark codes add detail to the reason code on the same claim line.

Submit a new claim with the information

Unofficial reference. This is our own plain-English explanation, not the official code text. Payer rules differ. Verify with the payer and the official X12 code list. AlphaPrefix is not affiliated with X12, CMS or any payer. Data last updated Nov 11, 2026.

What N517 means

The payer will not reprocess this claim as is and wants a new claim that includes the information it asked for.

N517 tells you how to fix the claim. Instead of sending records or an appeal against this claim number, the payer wants a fresh submission that contains the missing details.

It usually sits alongside another remark that names the missing item and a reason code such as 16. Treat it as a correction, not a dispute.

Common causes

• Required claim data was missing and the payer closed the claim instead of pending it.
• The payer's system cannot accept the requested data as an attachment to the old claim.
• A correction is needed that only a new submission can carry.

What to do next

1. Read the other remark codes on the line to see exactly what is missing.
2. Add the requested information to the claim in the correct field.
3. Submit as a new claim, not a replacement, unless the payer says otherwise.
4. Keep proof of the original submission date in case filing deadlines come up.

Related codes

• 16 (reason code) Missing information or billing error
• N34 (remark code) Wrong claim form or format
• N704 (remark code) No appeal, but can be corrected