How to appeal a diagnosis-procedure mismatch denial.

A CARC 11 denial is triggered by an automated check, not a clinical reviewer, so the fix often lives in the code itself rather than in a lengthy dispute. The payer's system is asking a narrow question: does this diagnosis, as coded, justify this procedure, as coded, under our coverage rules? Sometimes the answer is no because the diagnosis truly does not support the procedure. More often, the answer is no because the diagnosis code was too general, was missing a required laterality or specificity digit, or simply was not on the payer's approved list for that CPT code even though the clinical picture supports it. This guide walks through how to tell the two apart and how to build the appeal when the underlying clinical case is sound.