Rheumatoid vasculitis with rheumatoid arthritis of unsp knee

This code signifies a systemic inflammatory condition where the blood vessels are affected by rheumatoid arthritis, specifically impacting an unspecified knee joint. It indicates the presence of vasculitis as a manifestation of rheumatoid disease.

Use this code when documentation clearly states rheumatoid vasculitis in a patient with rheumatoid arthritis, and the knee is identified as an affected joint, but the laterality (right or left) is not specified. This code requires a definitive diagnosis of both rheumatoid arthritis and rheumatoid vasculitis.

• Ensure documentation specifies "vasculitis" as a complication of rheumatoid arthritis, not just general inflammation.
• If the laterality of the affected knee is known (right or left), a more specific code should be used.
• Always sequence the underlying rheumatoid arthritis code (e.g., M05.xx) first, followed by this code for the vasculitis manifestation.