M18.9
BillableOsteoarthritis of first carpometacarpal joint, unspecified
M18.9 is the ICD-10-CM code for Osteoarthritis of first carpometacarpal joint, unspecified. It is a billable, specific code valid for reimbursement.
M00-M99 Diseases of the musculoskeletal system and connective tissue
No additional coding notes for this code.
Frequently asked questions
- What is ICD-10 code M18.9?
- M18.9 is the ICD-10-CM code for "Osteoarthritis of first carpometacarpal joint, unspecified". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
- Is M18.9 a billable code?
- Yes — M18.9 is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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