Pauciarticular juvenile rheumatoid arthritis, right knee

This code signifies a chronic inflammatory joint disease affecting the right knee in individuals under 16 years of age. It is characterized by arthritis in four or fewer joints, with the right knee being one of the affected joints. This condition is a subtype of juvenile idiopathic arthritis (JIA).

Use this code when documentation clearly indicates a diagnosis of pauciarticular juvenile rheumatoid arthritis specifically affecting the right knee. This diagnosis is typically made by a rheumatologist based on clinical examination, patient history, and exclusion of other conditions. Supporting documentation should specify the laterality and the limited number of affected joints.

• Ensure documentation specifies "pauciarticular" and the laterality of the affected knee (right).
• Do not confuse with polyarticular JIA, which involves five or more joints.
• Consider additional codes for any associated systemic manifestations or complications.