Juvenile arthritis, unspecified, right knee

This code signifies an unspecified form of juvenile arthritis affecting the right knee. It indicates inflammation of the joint in a patient under 16 years of age, where the specific type of juvenile idiopathic arthritis (JIA) has not been determined or documented.

Use this code when documentation clearly states juvenile arthritis of the right knee without further specification of the JIA subtype (e.g., oligoarticular, polyarticular, systemic). This is appropriate for initial encounters or when diagnostic workup for JIA is incomplete.

• Ensure the patient's age is consistent with the definition of juvenile arthritis (typically under 16 years old).
• Always strive for greater specificity if the type of juvenile arthritis is known (e.g., M08.061 for juvenile rheumatoid arthritis, right knee).
• If laterality is not specified, use the unspecified laterality code (M08.969).