M86.461

HCC Category Mapping

What This Code Means

A chronic bone infection of the right 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 'right' 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 affecting the right tibia and fibula represents a complex, long-standing bone infection with persistent external drainage requiring intensive medical and surgical management. The involvement of both lower leg bones significantly impacts mobility and weight-bearing capacity, necessitating comprehensive treatment approaches and long-term monitoring.

Documentation Requirements

• ✓Clear documentation of chronic osteomyelitis diagnosis
• ✓Evidence of draining sinus tract with ongoing drainage
• ✓Specific identification of right tibia and fibula involvement
• ✓Description of sinus tract location and characteristics
• ✓Microbiological identification from cultures
• ✓Imaging studies showing bone infection and sinus pathway
• ✓Comprehensive treatment history and current management
• ✓Assessment of functional impact on ambulation and weight-bearing

Commonly Confused Codes