M18.12
BillableUnilateral primary osteoarthritis of first carpometacarpal joint, left hand
M18.12 is the ICD-10-CM code for Unilateral primary osteoarthritis of first carpometacarpal joint, left hand. 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 M18.12?
- M18.12 is the ICD-10-CM code for "Unilateral primary osteoarthritis of first carpometacarpal joint, left hand". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
- Is M18.12 a billable code?
- Yes — M18.12 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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