Rheumatoid vasculitis w rheumatoid arthritis of right knee

This code signifies a systemic inflammatory condition where blood vessels are damaged due to rheumatoid arthritis, specifically affecting the right knee. It indicates the presence of vasculitis as an extra-articular manifestation of rheumatoid arthritis.

Apply this code when documentation clearly states rheumatoid vasculitis in a patient with rheumatoid arthritis, with specific involvement of the right knee joint. This diagnosis typically arises from clinical examination, imaging, and possibly biopsy findings confirming vasculitis in the context of RA.

• Ensure documentation specifies "rheumatoid vasculitis" and not just general vasculitis.
• Verify the laterality (right knee) is explicitly stated; do not assume.
• This code inherently includes rheumatoid arthritis, so a separate RA code for the right knee is generally not needed unless other specific RA manifestations are present.