ICD-10 Code M05.41 – Rheumatoid myopathy with rheumatoid arthritis of shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.41 – Rheumatoid myopathy with rheumatoid arthritis of shoulder
What it is
This code identifies rheumatoid arthritis affecting the shoulder, with associated myopathy documented by the provider. It tells you the joint disease and the muscle involvement are both part of the diagnosis.
Clinical signs
Findings may include shoulder pain, stiffness, swelling, reduced range of motion, and muscle weakness around the affected joint. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states rheumatoid myopathy and rheumatoid arthritis of the shoulder. It applies when the shoulder is the specified joint and the muscle disorder is linked to the rheumatoid condition. If the note does not identify the shoulder or myopathy, 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 guess the joint or muscle involvement if the provider has not specified them.
Coding tip
Verify that both rheumatoid myopathy and shoulder involvement are documented before assigning M05.41.