M18.50
BillableOther unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand
M18.50 is the ICD-10-CM code for Other unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand. It is a billable, specific code valid for reimbursement.
M00-M99 Diseases of the musculoskeletal system and connective tissue
What this means — in plain language
MedlinePlus · NIHWhat is osteoarthritis? Osteoarthritis, sometimes called OA, is a type of arthritis that only affects the joints, usually in the hands, knees, hips, neck, and lower back. It's the most common type of arthritis. In a healthy joint, the ends of the bones are covered with a smooth, slippery tissue called cartilage. The cartilage pads the bones and helps them glide easily when you move the joint. With osteoarthritis,…
Read more about Osteoarthritis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code M18.50?
- M18.50 is the ICD-10-CM code for "Other unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
- Is M18.50 a billable code?
- Yes — M18.50 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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