 
| ICD-10-CM-2023 > M00-M99 > M15-M19 > M18 | 
| M15-M19 | Osteoarthritis | |
| Excl2.: | osteoarthritis of spine (M47.-) | |
| M18 | Osteoarthritis of first carpometacarpal joint | |
| M18.0 | Bilateral primary osteoarthritis of first carpometacarpal joints | |
| M18.1 | Unilateral primary osteoarthritis of first carpometacarpal joint | |
| Info: | 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 | |
| M18.2 | Bilateral post-traumatic osteoarthritis of first carpometacarpal joints | |
| M18.3 | Unilateral post-traumatic osteoarthritis of first carpometacarpal joint | |
| Info: | Post-traumatic osteoarthritis of first carpometacarpal joint NOS | |
| M18.30 | Unilateral post-traumatic osteoarthritis of first carpometacarpal joint, unspecified hand | |
| M18.31 | Unilateral post-traumatic osteoarthritis of first carpometacarpal joint, right hand | |
| M18.32 | Unilateral post-traumatic osteoarthritis of first carpometacarpal joint, left hand | |
| M18.4 | Other bilateral secondary osteoarthritis of first carpometacarpal joints | |
| M18.5 | Other unilateral secondary osteoarthritis of first carpometacarpal joint | |
| Info: | Secondary osteoarthritis of first carpometacarpal joint NOS | |
| M18.50 | Other unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand | |
| M18.51 | Other unilateral secondary osteoarthritis of first carpometacarpal joint, right hand | |
| M18.52 | Other unilateral secondary osteoarthritis of first carpometacarpal joint, left hand | |
| M18.9 | Osteoarthritis of first carpometacarpal joint, unspecified | |
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