ICD-10 Code M05.279 – Rheumatoid vasculitis with rheumatoid arthritis of unspecified ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.279 – Rheumatoid vasculitis with rheumatoid arthritis of unspecified ankle and foot
What it is
This code identifies rheumatoid arthritis complicated by rheumatoid vasculitis, with involvement of an unspecified ankle and foot. Use it when the record confirms vasculitic disease linked to rheumatoid arthritis in that location.
Clinical signs
Clinical features vary; refer to documentation. Findings may include inflammatory arthritis with evidence of vasculitis affecting the ankle or foot, such as skin changes, pain, ulcers, or ischemic features when documented.
When to use this code
Use this code when the provider documents rheumatoid vasculitis and specifies rheumatoid arthritis involving an unspecified ankle and foot. It is appropriate when the laterality or exact joint detail is not stated. Confirm that vasculitis is part of the diagnosis, not just rheumatoid arthritis alone.
Do not use for
Do not use this code for rheumatoid arthritis without vasculitis, or for vasculitis unrelated to rheumatoid disease. If the ankle or foot site is not documented, or documentation is unclear, check documentation.
Coding tip
Verify both the rheumatoid vasculitis and the ankle/foot location in the assessment before assigning M05.279.