Other dermatomyositis without myopathy

This code describes a form of inflammatory myopathy characterized by skin manifestations typical of dermatomyositis, such as Gottron's papules or heliotrope rash, but without evidence of muscle weakness or elevated muscle enzymes. It represents a specific subtype where the disease primarily affects the skin.

Use this code when documentation clearly indicates dermatomyositis with characteristic cutaneous findings, but electromyography (EMG) and muscle biopsy do not show myopathic changes, and the patient does not present with muscle weakness. This diagnosis is often made in cases of amyopathic dermatomyositis or dermatomyositis sine myositis.

• Ensure documentation explicitly states "without myopathy" or "amyopathic" to support this specific code.
• Distinguish from M33.0- (Juvenile dermatomyositis) and M33.10 (Other dermatomyositis, unspecified).
• Code any associated complications or manifestations separately, such as interstitial lung disease, if present.