Juvenile rheumatoid arthritis w systemic onset, left ank/ft

This diagnosis code signifies a chronic inflammatory arthropathy affecting the left ankle and foot in a pediatric patient, characterized by systemic features such as fever, rash, and lymphadenopathy, in addition to joint involvement. It represents a specific subtype of juvenile idiopathic arthritis (JIA) where systemic manifestations are prominent at disease onset.

Apply this code when documentation clearly indicates a diagnosis of systemic onset juvenile rheumatoid arthritis (now termed systemic JIA) with active inflammatory involvement of the left ankle and/or foot. Supporting clinical notes should detail the systemic symptoms present at onset, along with objective findings of arthritis in the specified joint.

• Ensure documentation specifies "systemic onset" and not another JIA subtype, as this significantly impacts code selection.
• Verify laterality (left ankle and foot) is explicitly stated; if bilateral or right-sided, a different code is required.
• Consider co-reporting codes for specific systemic manifestations (e.g., pericarditis, uveitis) if documented and clinically relevant.