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N537 Remark Code: No Record of Services in History

N537 means the payer examined its claims history and found no records of the services in question. The payer cannot act on a request, such as an adjustment, appeal, refund, or related claim, because it has no matching claim on file.

Quick facts

Code
N537 (RARC N537)
Status
Active In use since July 1, 2010.
Code set
Remittance Advice Remark Codes (RARC)
Group codes
  • CO (Contractual Obligation): The payer could not match the request to a claim. The provider should verify the details or submit the claim.
  • OA (Other Adjustment): Some payers report this as an other adjustment on a request that could not be matched.
Official description
We have examined claims history and no records of the services have been found.
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What N537 means

N537 is a dead end in the payer’s records. You sent something that pointed back to earlier services, and when the payer searched its claims history, nothing matched. It is not a judgment on the services themselves. It means the payer cannot find what you are referring to.

Common causes

  • Wrong reference number. A corrected or void claim (resubmission code 7 or 8 in box 22) carried an incorrect original claim number.
  • The original never arrived. The first claim was rejected at the clearinghouse or payer front end and never entered claims history.
  • Wrong payer or plan. The original went to a different payer, a different product, or a separate processing entity.
  • Patient identifiers differ. The original was filed under a different member ID or name.
  • Dependent services. A claim required proof of a prior service, such as a qualifying procedure, that the payer never processed.

How to fix it

  1. Check your submission history for the original claim: acceptance reports, payer acknowledgments, and any earlier remittance.
  2. Verify the claim number you referenced against the payer’s remittance, and correct it if needed.
  3. Submit the original claim if it never reached the payer, and include proof of earlier submission if you are near the filing limit.
  4. Confirm patient identifiers and the correct payer before resubmitting.
  5. Call the payer if records show the claim was processed but it still cannot find it.

How to prevent it

Reconcile clearinghouse acceptance reports daily so rejected claims are caught before anyone follows up on them. The claim rejection versus denial guide explains why a rejected claim leaves no history with the payer.

Codes that may appear with N537

  • CO-16 (Claim/service lacks information or has submission/billing error(s).): The request lacked information needed to locate the original claim.
  • CO-129 (Prior processing information appears incorrect.): Prior processing information appears incorrect.
  • CO-107 (The related or qualifying claim/service was not identified on this claim.): The related or qualifying claim was not identified.
  • N5 (EOB received from previous payer.): The payer received a prior payer's EOB but has no claim on file.
  • M47 (Missing/incomplete/invalid Payer Claim Control Number.): The payer claim control number is missing, incomplete, or invalid.
  • N152 (Missing/incomplete/invalid replacement claim information.): Replacement claim information is missing or invalid.

N537 FAQ

When does N537 usually appear?

Often in response to a corrected claim, void, appeal, or refund that references a claim the payer cannot find, or when a claim depends on a prior service the payer has no record of.

What if I have proof I submitted the claim?

Send the payer your clearinghouse acceptance report or payer acknowledgment. If the payer never received it, submit the claim now and include the proof in case timely filing becomes an issue.

Can a wrong claim number cause N537?

Yes. A mistyped or outdated payer claim control number on a corrected claim is a common cause.