M86.532

HCC Category Mapping

What This Code Means

A chronic bone infection of the left forearm bones (radius and ulna) that developed from a bloodstream infection.

Coding Tips

• •Confirm documentation specifies left forearm to support this laterality-specific code
• •The radius and ulna are the two bones of the forearm; this code applies when either or both are infected

Clinical Significance

Chronic hematogenous osteomyelitis represents a serious bone infection that originated from bloodstream bacteria and has persisted over time, indicating failure of initial treatment or host immune response. This condition significantly impacts patient mobility, quality of life, and requires long-term antibiotic therapy with potential surgical intervention.

Documentation Requirements

• ✓Confirmation of chronic nature (duration >6 weeks or recurrent episodes)
• ✓Evidence of hematogenous origin (bloodstream spread vs direct inoculation)
• ✓Specific anatomical location: left radius and ulna
• ✓Imaging findings (X-ray, MRI, or bone scan) showing bone infection
• ✓Laboratory evidence (elevated ESR, CRP, or positive blood cultures)
• ✓Clinical symptoms (bone pain, fever, functional limitation)
• ✓Treatment history and response to prior therapy
• ✓Exclusion of acute osteomyelitis or other bone pathology

Commonly Confused Codes