M86.321

HCC Category Mapping

What This Code Means

A long-standing bone infection affecting multiple bones, specifically involving the right upper arm bone (humerus).

Coding Tips

• •This code indicates the right humerus is one of multiple affected sites; ensure all other involved bones are documented and coded.
• •Verify that 'right' is clearly documented in the medical record before assigning this code.

Clinical Significance

Chronic multifocal osteomyelitis affecting the right humerus represents a severe bone infection with significant implications for upper extremity function and overall patient health. The multifocal nature suggests systemic involvement requiring intensive antibiotic therapy, potential surgical intervention, and long-term monitoring for complications including bone destruction and functional impairment.

Documentation Requirements

• ✓Clear documentation of chronic osteomyelitis diagnosis
• ✓Specific identification of multifocal involvement pattern
• ✓Anatomic specification of right humerus location
• ✓Evidence of active or persistent infection (cultures, imaging)
• ✓Documentation of infectious organism when identified
• ✓Treatment history including antibiotic regimens and duration
• ✓Surgical interventions, debridements, or hardware involvement
• ✓Functional assessment and impact on activities of daily living

Commonly Confused Codes