M87.059

HCC Category Mapping

What This Code Means

Death of bone tissue in the thighbone (femur) without infection, occurring without a known cause, when the specific side is not specified. This condition commonly affects the femoral head and can severely limit walking and weight-bearing activities.

Coding Tips

• •Use this code only when laterality cannot be determined from documentation
• •Query the provider to clarify whether the condition is unilateral or bilateral

Clinical Significance

Idiopathic aseptic necrosis of unspecified femur represents bone death in the thighbone when laterality is not documented, commonly affecting the femoral head and severely limiting walking and weight-bearing activities. This condition commonly affects the femoral head and can severely limit walking and weight-bearing activities, often requiring hip replacement surgery.

Documentation Requirements

• ✓Documentation of aseptic necrosis affecting femur bone
• ✓Confirmation of idiopathic etiology without identifiable cause
• ✓Imaging studies showing bone necrosis in femoral structures
• ✓Absence of specific laterality documentation in medical record
• ✓Exclusion of infectious causes through clinical assessment
• ✓Hip and leg functional assessment including weight-bearing ability
• ✓Treatment plan documentation including therapeutic interventions
• ✓Pain management strategies and mobility impact assessment

Commonly Confused Codes