Juvenile rheumatoid arthritis w systemic onset, left elbow

This code signifies a chronic inflammatory autoimmune disease affecting the left elbow joint in a pediatric patient, characterized by systemic symptoms such as fever, rash, and lymphadenopathy, in addition to arthritis. It represents a specific subtype of juvenile idiopathic arthritis (JIA) where systemic manifestations precede or accompany the onset of joint inflammation.

Use this code when documentation confirms a diagnosis of juvenile rheumatoid arthritis with systemic onset, specifically affecting the left elbow. Supporting clinical notes should detail systemic features (e.g., quotidian fever, evanescent rash, serositis) alongside objective evidence of arthritis in the left elbow joint.

• Ensure documentation clearly specifies "systemic onset" and laterality (left elbow) to differentiate from other JIA subtypes or affected joints.
• Do not use this code for other forms of JIA, such as oligoarticular or polyarticular, even if systemic symptoms are present later in the disease course.
• Always review the entire medical record to confirm the diagnostic criteria for systemic-onset JIA are met.