CO-11 · CARC
CO-11 — Diagnosis inconsistent with procedure
What it means
The payer's edits say the ICD-10 diagnosis doesn't justify the CPT service. In therapy this usually means a missing, non-specific, or mismatched diagnosis code.
Standard definition (paraphrased): The diagnosis reported does not support the procedure billed.
Why it happens
- • A non-specific or placeholder diagnosis was used
- • The diagnosis on the claim differs from the one supporting the service
- • A required additional/secondary diagnosis was omitted
Common next steps therapists take
- • Re-check the ICD-10 code(s) against the documented clinical picture
- • Confirm the diagnosis actually supports the CPT billed, then resubmit if a correction is warranted
Related CPT codes
Educational information only
This page is general educational information, not legal, billing, or medical advice, and not a determination about any specific claim. Denial codes are maintained by the X12 committee and updated periodically. Always verify code meanings, benefits, and requirements directly with the payer and against your own records.
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