ICD-10-CM › M00-M99 › M15-M19 › M18 Osteoarthritis of first... › M18.5
Other unilateral secondary osteoarthritis of first carpometacarpal joint
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 3 more specific codes instead:
What has happened to this code
Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2012 Added to the draft code set draft Other unilateral secondary osteoarthritis of first carpometacarpal joint
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from the M15-M19 section Osteoarthritis (M15-M19)
Excludes2 - not included here
- osteoarthritis of spine (M47.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Arthrosis
- Osteoarthrosis
- Arthritis, arthritic > atrophic
- Arthritis, arthritic > deformans
- Arthritis, arthritic > degenerative
- Disease, diseased > joint > degenerative
- Disease, diseased > joint > hypertrophic
- Arthritis, arthritic > senile or senescent
- Degeneration, degenerative > joint disease
- Arthritis, arthritic > meaning osteoarthritis
- Osteoarthritis > wrist > first carpometacarpal joint
- Osteoarthritis > hand joint > first carpometacarpal joint > secondary
- Osteoarthritis > secondary > hand joint > first carpometacarpal joint
Codes in the same group
| Code | Description | Status |
|---|---|---|
| M18.0 | Bilateral primary osteoarthritis of first carpometacarpal joints | Valid |
| M18.1 | Unilateral primary osteoarthritis of first carpometacarpal joint | Not billable |
| M18.2 | Bilateral post-traumatic osteoarthritis of first carpometacarpal joints | Valid |
| M18.3 | Unilateral post-traumatic osteoarthritis of first carpometacarpal joint | Not billable |
| M18.4 | Other bilateral secondary osteoarthritis of first carpometacarpal joints | Valid |
| M18.9 | Osteoarthritis of first carpometacarpal joint, unspecified | Valid |