N56: Procedure code billed is not correct/valid for the services billed or the date of service billed
The CPT/HCPCS code on the claim does not match the payer's expectation for the service described or was not valid on the date of service billed, often because the code set changed or the code was deleted.
Corrective actions
- 1
Verify the code was active on the date of service
Check the CPT/HCPCS code set effective for that calendar year or quarter, since codes are added, revised, and retired annually.
- 2
Resubmit with the corrected code
Correct the procedure code to the one valid for the actual date of service and documentation, then resubmit as a corrected claim.
Usually paired with
Retrieved 2026-07-18.
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DenialPath provides billing and administrative guidance based on published CMS and X12 sources. It is not medical advice, not a coverage determination, and not a guarantee of payment. NCCI and MUE edits are republished quarterly and payer policies vary by contract. Always confirm against the payer's own current policy before submitting or appealing.