M18.1: Unilateral primary osteoarthritis of first carpometacarpal joint inclusionTerm Primary osteoarthritis of first carpometacarpal joint NOS |
| M18.10: Unilateral primary osteoarthritis of first carpometacarpal joint, unspecified hand |
| M18.11: Unilateral primary osteoarthritis of first carpometacarpal joint, right hand |
| M18.12: Unilateral primary osteoarthritis of first carpometacarpal joint, left hand |