M18.3
M18.3: Unilateral post-traumatic osteoarthritis of first carpometacarpal joint
Non-billable headerICD-10-CM
M18.3 is a non-billable header ICD-10-CM code for unilateral post-traumatic osteoarthritis of first carpometacarpal joint. It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Post-traumatic osteoarthritis of first carpometacarpal joint NOS
Other codes that can never be billed with M18.3
Their own Excludes1 notes name this code, so the conflict is not listed above.
- M12.5Traumatic arthropathy
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead M18.3
3 child codes. Green means billable.
Other codes under M18
- M18.0Bilateral primary osteoarthritis of first carpometacarpal joints
- M18.1Unilateral primary osteoarthritis of first carpometacarpal joint
- M18.2Bilateral post-traumatic osteoarthritis of first carpometacarpal joints
- M18.4Other bilateral secondary osteoarthritis of first carpometacarpal joints
- M18.5Other unilateral secondary osteoarthritis of first carpometacarpal joint
- M18.9Osteoarthritis of first carpometacarpal joint, unspecified