ICD-10 Code M05.262 – Rheumatoid vasculitis with rheumatoid arthritis of left knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.262 – Rheumatoid vasculitis with rheumatoid arthritis of left knee
What it is
This code identifies rheumatoid vasculitis occurring with rheumatoid arthritis in the left knee. It signals an inflammatory autoimmune complication affecting blood vessels and the specified joint.
Clinical signs
Clinical features vary; refer to documentation. You may see rheumatoid arthritis affecting the left knee along with evidence of vasculitic involvement, such as ischemic or inflammatory findings tied to rheumatoid vasculitis.
When to use this code
Use this code when the record clearly documents rheumatoid vasculitis and rheumatoid arthritis involving the left knee. The left knee must be specified, and the vasculitic complication should be linked to the rheumatoid disease.
Apply it for encounters where the diagnosis is established, not merely suspected. Check documentation if the note mentions rheumatoid arthritis without vasculitis, or vasculitis without the left-knee site.
Do not use for
Do not use this code for rheumatoid arthritis of the left knee without vasculitis. It is also incorrect if the vasculitis is unrelated to rheumatoid arthritis or the affected joint is not documented as the left knee.
Coding tip
Verify both the vasculitis complication and the left-knee laterality in the provider note before assigning M05.262.