M33.93

HCC Category Mapping

What This Code Means

A rare autoimmune disease that causes inflammation of the skin and muscles without muscle weakness, characterized by a skin rash typically on the face, neck, and hands.

Coding Tips

• •Use this code only when myopathy is explicitly documented as absent or not present
• •Verify documentation confirms dermatopolymyositis diagnosis and absence of muscle involvement before coding

Clinical Significance

Unspecified dermatopolymyositis without myopathy indicates primarily skin and systemic involvement with preserved muscle function, though still requires treatment for inflammatory disease and monitoring for progression. This form may have better functional prognosis but requires ongoing surveillance.

Documentation Requirements

• ✓Evidence of skin involvement consistent with dermatomyositis
• ✓Documentation of absent or minimal muscle weakness
• ✓Normal or minimally elevated muscle enzymes
• ✓Documentation that specific subtype cannot be determined
• ✓Preserved muscle strength on examination
• ✓Treatment plan for skin and systemic involvement
• ✓Monitoring plan for potential muscle involvement development
• ✓Assessment of skin disease activity and response

Commonly Confused Codes