M86.439

HCC Category Mapping

What This Code Means

A long-term bone infection in the forearm bones (radius and ulna) with a draining sinus tract, but the specific side (right or left) is not identified.

Coding Tips

• •This is a less specific code; attempt to determine laterality from clinical documentation or query the provider
• •Use M86.431 or M86.432 when the side is clearly documented

Clinical Significance

Chronic osteomyelitis with draining sinus of unspecified radius and ulna indicates a severe bone infection affecting forearm bones with persistent drainage when laterality is not documented. This condition significantly impacts arm function and requires intensive management due to drainage complications.

Documentation Requirements

• ✓Documentation of radius and ulna involvement without laterality
• ✓Evidence of chronic infection (>6 weeks duration or recurrent)
• ✓Confirmation of active draining sinus tract from forearm bones
• ✓Imaging findings consistent with chronic osteomyelitis
• ✓Clinical evidence of persistent drainage from forearm
• ✓Laboratory evidence supporting chronic infectious process
• ✓Treatment history addressing both infection and drainage
• ✓Absence of clear laterality specification in record

Commonly Confused Codes