Question: Encounter notes indicate that the provider diagnosed C2-C3 disc disorder with radiculopathy. What diagnosis code is most appropriate for this diagnosis? I can’t find a match in the ICD-10 manual. Tennessee Subscriber Answer: The code you’re looking for is M50.11 (Cervical disc disorder with radiculopathy, high cervical region). Your diagnosis as written doesn’t match any ICD-10 codes, but it is listed as a synonym for M50.11. Here are all of the synonyms listed under M50.11; use this diagnosis code if you see any of the conditions below on the encounter form: