ICD-10 Code M05.411 – Rheumatoid myopathy with rheumatoid arthritis of right shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.411 – Rheumatoid myopathy with rheumatoid arthritis of right shoulder
What it is
This code identifies rheumatoid arthritis affecting the right shoulder with associated rheumatoid myopathy. Use it when the record shows both joint disease and muscle involvement tied to rheumatoid disease.
Clinical signs
Findings may include right shoulder pain, stiffness, reduced range of motion, and weakness consistent with myopathy. Clinical features vary; refer to documentation.
When to use this code
Use M05.411 when the provider documents rheumatoid arthritis in the right shoulder and specifically links it to rheumatoid myopathy. The note should support both the joint diagnosis and the muscle involvement. If the record does not clearly identify the right shoulder or the myopathy component, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis without documented myopathy, or for shoulder pain from another cause. Do not apply it when the affected side is not the right shoulder.
Coding tip
Confirm laterality and the explicit connection between rheumatoid arthritis and myopathy before assigning this code.