M05.49

HCC Category Mapping

What This Code Means

Rheumatoid arthritis with muscle weakness or damage affecting multiple joints throughout the body simultaneously.

Coding Tips

• •Document must clearly indicate involvement of multiple sites (at least 2 different anatomical areas)
• •This code captures systemic manifestations of rheumatoid arthritis affecting muscles and multiple joints

Clinical Significance

This diagnosis represents the most severe form of rheumatoid arthritis with myopathy affecting multiple anatomical sites simultaneously, indicating widespread systemic inflammatory disease. The multi-site involvement suggests aggressive disease requiring intensive immunosuppressive therapy and comprehensive rehabilitation approaches.

Documentation Requirements

• ✓Confirmed rheumatoid arthritis diagnosis with established clinical criteria
• ✓Documentation of multiple joint sites affected by RA
• ✓Clinical evidence of myopathy with muscle weakness or dysfunction
• ✓Specific identification of at least two different anatomical regions
• ✓Assessment of functional impact across multiple body areas
• ✓Evidence of systemic inflammatory disease activity
• ✓Comprehensive treatment plan for polyarticular disease and myopathy

Commonly Confused Codes