ICD-10 Code M05.21 – Rheumatoid vasculitis with rheumatoid arthritis of shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.21 – Rheumatoid vasculitis with rheumatoid arthritis of shoulder
What it is
This code identifies rheumatoid arthritis affecting the shoulder, with associated rheumatoid vasculitis. Use it when documentation shows both the joint disease and vasculitic involvement.
Clinical signs
Findings may include chronic inflammatory shoulder pain, stiffness, reduced range of motion, and evidence of vasculitis. Clinical features vary; refer to documentation.
When to use this code
Use M05.21 when the provider documents rheumatoid vasculitis in a patient with rheumatoid arthritis of the shoulder. It applies when the shoulder is the specified joint site. If the record does not clearly link vasculitis and shoulder involvement, check documentation.
Do not use for
Do not use this code for rheumatoid arthritis of the shoulder without vasculitis, or for vasculitis without rheumatoid arthritis. Check documentation if the affected joint or systemic manifestation is unclear.
Coding tip
Confirm both components are documented: rheumatoid vasculitis and shoulder involvement, before assigning M05.21.