Juvenile rheumatoid arthritis w systemic onset, right ank/ft

This code signifies a diagnosis of juvenile idiopathic arthritis (JIA) of the systemic onset subtype, specifically affecting the right ankle and foot. Systemic JIA is characterized by arthritis accompanied by fever, rash, lymphadenopathy, hepatosplenomegaly, and serositis.

Apply this code when documentation clearly indicates systemic onset JIA with inflammatory arthritis localized to the right ankle and/or foot. This diagnosis requires a physician's confirmed assessment of systemic JIA and specific joint involvement.

• Ensure documentation specifies "systemic onset" JIA, not another subtype.
• Verify laterality (right) and specific joint involvement (ankle and foot).
• Code any associated systemic manifestations (e.g., fever, rash) separately if documented.