M87.379

HCC Category Mapping

What This Code Means

Death of bone tissue in one or more toes caused by an underlying condition or disease, where the specific toe(s) affected are not identified.

Coding Tips

• •Use this code when the secondary cause of osteonecrosis is documented but the specific toe(s) cannot be determined
• •If a specific toe is identifiable, consider using a more specific code (M87.371-M87.378) instead

Clinical Significance

This diagnosis represents secondary osteonecrosis of toe bones when the specific toe or laterality is not identified, caused by underlying disease processes. It requires identification of the causative factor and monitoring for progression that could impact ambulation.

Documentation Requirements

• ✓Documentation of osteonecrosis affecting toe(s) without specific identification
• ✓Identification of underlying cause (e.g., corticosteroid use, radiation therapy, vascular disease)
• ✓Imaging findings confirming toe bone necrosis
• ✓Clinical symptoms such as toe pain, swelling, or deformity
• ✓Functional impact on walking or footwear
• ✓Duration and progression of condition
• ✓Treatment history and response
• ✓Reason why specific toe or laterality cannot be determined

Commonly Confused Codes