M90.529

HCC Category Mapping

What This Code Means

Death of bone tissue in the upper arm (side not specified) caused by another disease or condition affecting the body.

Coding Tips

• •Use this code only when laterality (left or right) cannot be determined from documentation
• •Always pair with the underlying disease code that is causing the osteonecrosis

Clinical Significance

Secondary osteonecrosis of the upper arm without laterality specification represents bone death in the humerus caused by underlying systemic disease. This condition indicates serious skeletal complications with potential for pathological fracture and functional impairment requiring comprehensive management.

Documentation Requirements

• ✓Primary causative disease documented and coded first per coding guidelines
• ✓Clinical evidence of upper arm bone necrosis present
• ✓Diagnostic imaging studies confirming osteonecrosis
• ✓Functional assessment of affected upper extremity
• ✓Risk stratification for potential pathological fracture
• ✓Treatment plan addressing both underlying disease and bone pathology
• ✓Documentation explaining why laterality cannot be specified

Commonly Confused Codes