ICD-10-CMICD-10-CMM18.10 — Unilateral primary osteoarthritis of first carpometacarpal joint, unspecified hand
ICD-10-CMICD-10-CMM18.11 — Unilateral primary osteoarthritis of first carpometacarpal joint, right hand
ICD-10-CMICD-10-CMM18.12 — Unilateral primary osteoarthritis of first carpometacarpal joint, left hand