M86.462

HCC Category Mapping

What This Code Means

A chronic bone infection of the left shin bones (tibia and fibula) that has created an open drainage channel through the skin, allowing infected material to drain continuously.

Coding Tips

• •Verify laterality is documented as 'left' in the medical record before assigning this code
• •This code encompasses both the tibia and fibula as a single anatomical unit in the lower leg

Clinical Significance

Chronic osteomyelitis with draining sinus of the left tibia and fibula indicates a severe, persistent bone infection with external drainage pathway that significantly compromises lower extremity function. This complex condition requires intensive antibiotic therapy, surgical intervention, and ongoing wound management, substantially impacting patient mobility and overall health status.

Documentation Requirements

• ✓Documentation of chronic osteomyelitis with established diagnosis
• ✓Clear evidence of draining sinus tract presence and activity
• ✓Anatomic specification of left tibia and fibula involvement
• ✓Detailed description of drainage characteristics and volume
• ✓Culture results and antibiotic sensitivity testing
• ✓Imaging studies confirming infection extent and sinus tract
• ✓Treatment regimen including antibiotic duration and surgical history
• ✓Functional assessment and impact on daily activities

Commonly Confused Codes