RARC N54: Claim Does Not Match Prior Authorization Details
The services on your claim do not match what was pre-authorized — check for mismatched procedure codes, dates outside the authorized range, or quantities exceeding what was approved, then correct and resubmit.
What Does RARC N54 Mean?
RARC N54 fires when the payer compares the submitted claim against the prior authorization on file and finds discrepancies. The authorization exists, and it may even be for the same general type of service, but the specifics on the claim do not line up with what was approved. This is distinct from having no authorization at all — the issue here is a mismatch in the details.
Common mismatches include procedure codes that differ from what was authorized (even slightly different CPT codes for similar procedures), dates of service that fall outside the authorized date range, quantities or units that exceed the approved number, or a rendering provider who is different from the one listed on the authorization. Some payers are strict about these details while others allow reasonable variation, but N54 appears when the payer's system cannot reconcile the claim with the auth.
This code is particularly frustrating because it often means the authorization was obtained and the service was clinically appropriate — the denial is purely administrative. However, it still requires action to resolve, and ignoring it will leave the claim unpaid.
What to Do
Pull up the original authorization and compare it line by line against the claim. Look for differences in CPT/HCPCS codes, dates of service, units or visits approved, rendering provider NPI, and facility or place of service. Once you identify the discrepancy, determine whether the claim needs to be corrected to match the authorization, or whether the authorization itself needs to be updated to reflect what actually occurred.
If the service provided was clinically different from what was authorized (for example, the surgeon needed to perform a more extensive procedure than originally planned), contact the payer's utilization management department to request a retroactive authorization modification. If the mismatch is a simple coding or data entry error on the claim, correct it and resubmit. Always reference the authorization number on the corrected claim.
Common Scenarios
- An authorization was obtained for CPT 27447 (total knee replacement) but the claim was submitted with CPT 27446 (unicompartmental knee replacement), triggering a code mismatch
- Physical therapy visits were authorized through March 15 but the claim includes a session dated March 18, falling outside the authorized period
- The authorization lists 12 physical therapy visits but the claim includes the 13th visit, exceeding the approved quantity
- The authorization names one provider but a covering physician performed the service and their NPI is on the claim instead
Commonly Paired With
No common pairings documented yet.