M90.521

HCC Category Mapping

What This Code Means

Death of bone tissue in the right upper arm caused by another disease.

Coding Tips

• •Code the underlying disease condition separately (e.g., sickle cell disease, systemic lupus erythematosus)
• •Ensure documentation specifies right upper arm; this code is specific to that anatomical location

Clinical Significance

Secondary osteonecrosis of the right upper arm represents bone death in the humerus caused by underlying systemic disease, potentially leading to fracture risk and functional impairment. This condition requires careful monitoring and management of both the primary disease and skeletal complications.

Documentation Requirements

• ✓Primary disease causing osteonecrosis documented and sequenced first
• ✓Right upper arm/humerus specifically identified as affected site
• ✓Clinical or radiographic evidence of bone tissue death
• ✓Imaging studies supporting osteonecrosis diagnosis
• ✓Functional assessment of right arm strength and mobility
• ✓Risk assessment for pathological fracture
• ✓Treatment plan addressing underlying condition and bone pathology

Commonly Confused Codes