Juvenile dermatomyositis with other organ involvement

This code signifies a pediatric autoimmune inflammatory myopathy characterized by muscle weakness and a distinctive skin rash, accompanied by involvement of other organ systems. This systemic condition results from inflammation of small blood vessels in muscles and skin, extending to other tissues.

Apply this code when documentation specifies juvenile dermatomyositis with evidence of systemic manifestations beyond the skin and muscles, such as gastrointestinal, pulmonary, or cardiac involvement. Supporting documentation should clearly detail the specific organ(s) affected in addition to the classic dermatomyositis presentation.

• Do not use this code if organ involvement is not explicitly documented; consider M33.00 for unspecified organ involvement.
• Code any specific organ manifestations (e.g., interstitial lung disease, dysphagia) separately as secondary diagnoses.
• Ensure the patient's age aligns with the "juvenile" designation (typically onset before age 18).