Juvenile dermatomyositis without myopathy

This code describes a rare autoimmune inflammatory disease affecting the skin in children and adolescents, characterized by typical dermatomyositis skin rashes (e.g., Gottron papules, heliotrope rash) but without evidence of muscle weakness or inflammation (myopathy). It represents a specific subtype of juvenile dermatomyositis where the disease primarily manifests cutaneously.

Use this code when the medical record clearly documents a diagnosis of juvenile dermatomyositis, and diagnostic workup (e.g., muscle enzymes, EMG, muscle biopsy) confirms the absence of myopathy. This code is appropriate for patients presenting with characteristic skin findings of dermatomyositis in a pediatric population without muscular involvement.

• Ensure documentation explicitly states "without myopathy" or provides evidence ruling out muscle involvement.
• Do not confuse with M33.00 (Juvenile dermatomyositis, unspecified) or codes for adult dermatomyositis.
• Consider additional codes for specific skin manifestations or associated conditions if documented.