ICD-10 Code M05.441 – Rheumatoid myopathy with rheumatoid arthritis of right hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.441 – Rheumatoid myopathy with rheumatoid arthritis of right hand
What it is
This code identifies rheumatoid arthritis affecting the right hand with associated rheumatoid myopathy. Use it when the record shows both inflammatory joint disease and muscle involvement in that hand.
Clinical signs
Findings may include hand pain, swelling, stiffness, and reduced grip or hand function. Clinical features vary; refer to documentation for evidence of rheumatoid myopathy and right-hand joint involvement.
When to use this code
Use this code when the provider documents rheumatoid arthritis in the right hand and specifically links it to rheumatoid myopathy. It is appropriate for visits focused on chronic inflammatory hand disease with muscle weakness or myopathic involvement. Check documentation if laterality or the myopathy link is unclear.
Do not use for
Do not use it for rheumatoid arthritis without documented myopathy, or for myopathy unrelated to rheumatoid disease. Do not assign it when the affected hand is not clearly documented as right.
Coding tip
Confirm both the rheumatoid arthritis diagnosis and the right-sided hand laterality before coding.