ICD-10 Code M05.259 – Rheumatoid vasculitis with rheumatoid arthritis of unspecified hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.259 – Rheumatoid vasculitis with rheumatoid arthritis of unspecified hip
What it is
This code identifies rheumatoid arthritis complicated by rheumatoid vasculitis, with the hip involved but not specified as right or left. Use it when the record clearly links the vasculitis to rheumatoid arthritis and names the hip as the affected joint.
Clinical signs
Clinical features vary; refer to documentation. You may see established rheumatoid arthritis plus evidence of vasculitis, such as skin or systemic involvement, alongside hip joint inflammation or pain.
When to use this code
Use this code when the provider documents rheumatoid vasculitis in a patient with rheumatoid arthritis and identifies the hip as the affected site, but does not specify laterality. It is also appropriate when the hip is documented as involved and the record supports the vasculitic rheumatoid arthritis diagnosis. Check documentation if the note only says rheumatoid arthritis without vasculitis.
Do not use for
Do not use this code for rheumatoid arthritis of the hip without vasculitis, or for vasculitis not linked to rheumatoid arthritis. If the hip side is documented, choose the laterality-specific code instead.
Coding tip
Confirm both elements in the chart: rheumatoid vasculitis and rheumatoid arthritis of the hip; if either is missing, code the documented condition only.