ICD-10 Code M05.242 – Rheumatoid Vasculitis with Rheumatoid Arthritis of Left Hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.242 – Rheumatoid vasculitis with rheumatoid arthritis of left hand
What it is
M05.242 identifies rheumatoid arthritis in the left hand with associated rheumatoid vasculitis. Use it when the record shows both joint disease and vasculitic involvement in that hand.
Clinical signs
Findings may include painful, swollen, or deformed hand joints plus evidence of vasculitis affecting small vessels. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid vasculitis and specifies rheumatoid arthritis of the left hand. It is appropriate for encounters focused on that documented combination, even if the note emphasizes systemic disease. Check documentation if laterality or vasculitis is unclear.
Do not use for
Do not use it for rheumatoid arthritis of the left hand without vasculitis, or for vasculitis without documented rheumatoid arthritis. Do not guess laterality; check documentation.
Coding tip
Confirm both the vasculitis and the left-hand laterality in the provider note before assigning M05.242.