M33.92

Billable

Dermatopolymyositis, unspecified with myopathy

HCC Category Mapping

V28HCC 93 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.175

V24HCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.307

ESRDHCC 40 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

RxHCCHCC 83 — Rheumatoid Arthritis and Inflammatory Connective Tissue Disease

0.000

What This Code Means

A rare autoimmune disease with features of both dermatomyositis and polymyositis, with muscle inflammation and weakness.

Coding Tips

•Verify muscle involvement through elevated muscle enzymes, EMG abnormalities, or muscle biopsy
•Document whether skin manifestations are present to help differentiate from pure polymyositis

Clinical Significance

Unspecified dermatopolymyositis with myopathy indicates significant muscle involvement causing functional impairment and disability risk. This condition requires aggressive treatment and rehabilitation to prevent irreversible muscle damage and optimize functional outcomes.

Documentation Requirements

✓Evidence of inflammatory myopathy with both muscle and skin features
✓Documentation of muscle weakness and dysfunction
✓Elevated muscle enzymes and inflammatory markers
✓Documentation that specific subtype classification is unclear
✓Functional assessment of muscle strength and abilities
✓Treatment plan including immunosuppression and rehabilitation
✓Monitoring plan for muscle function
✓Assessment of disability and support needs

Commonly Confused Codes

M33.12 — Use when dermatomyositis is specifically diagnosed M33.22 — Use when polymyositis is specifically diagnosed M33.93 — Use when myopathy is absent M60.9 — Use for other myositis without characteristic features

Code Hierarchy

└M33Dermatopolymyositis └M33.9Dermatopolymyositis, unspecified └M33.92Dermatopolymyositis, unspecified with myopathy

└M33.92Dermatopolymyositis, unspecified with myopathy