Juvenile rheumatoid arthritis w systemic onset, left wrist

This code signifies a chronic inflammatory autoimmune disease affecting the left wrist in a pediatric patient, characterized by arthritis accompanied by systemic features such as fever, rash, lymphadenopathy, or serositis. It is a subtype of juvenile idiopathic arthritis (JIA) where systemic symptoms precede or coincide with the onset of arthritis.

Apply this code when documentation clearly indicates a diagnosis of juvenile rheumatoid arthritis with systemic onset, specifically affecting the left wrist. Supporting documentation should detail the systemic manifestations alongside the arthritis in the specified joint. This code is appropriate for initial diagnoses and subsequent encounters where the condition of the left wrist is being managed.

• Ensure documentation specifies "systemic onset" to differentiate from other JIA subtypes.
• Verify the affected joint is explicitly stated as the "left wrist"; laterality is crucial.
• Consider sequencing this code as the primary diagnosis when the systemic JIA is the focus of the encounter.