ICD-10 Code M05.27 – Rheumatoid vasculitis with rheumatoid arthritis of ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.27 – Rheumatoid vasculitis with rheumatoid arthritis of ankle and foot
What it is
This code identifies rheumatoid arthritis complicated by rheumatoid vasculitis affecting the ankle and foot. Use it when the record shows both the inflammatory joint disease and vasculitic involvement in these sites.
Clinical signs
Findings may include chronic inflammatory arthritis with signs of vasculitis such as skin lesions, neuropathic symptoms, or ischemic changes in the lower extremity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid vasculitis in a patient with rheumatoid arthritis and specifies the ankle and foot. It is appropriate for encounter notes, problem lists, or discharge summaries that clearly link the vasculitis to those joints. Check documentation if laterality or site detail is unclear.
Do not use for
Do not use this code for rheumatoid arthritis without vasculitis, or for vasculitis unrelated to rheumatoid disease. If the ankle and foot are not specified, check documentation for the correct rheumatoid arthritis code.
Coding tip
Verify that the provider explicitly connects rheumatoid vasculitis with rheumatoid arthritis and the ankle/foot site before assigning M05.27.