M86.322

Billable

Chronic multifocal osteomyelitis, left humerus

HCC Category Mapping

V28HCC 92 — Bone/Joint/Muscle Infections/Necrosis

0.209

V24HCC 39 — Bone/Joint/Muscle Infections/Necrosis

0.482

ESRDHCC 39 — Bone/Joint/Muscle Infections/Necrosis

0.000

What This Code Means

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

Coding Tips

•This code indicates the left humerus is one of multiple affected sites; document all other involved locations.
•Confirm laterality is documented as 'left' in the clinical documentation.

Clinical Significance

Chronic multifocal osteomyelitis of the left humerus indicates a complex, persistent bone infection that significantly compromises upper extremity function and requires comprehensive medical management. The multifocal pattern suggests widespread skeletal involvement, necessitating aggressive treatment approaches and continuous monitoring for progression and complications.

Documentation Requirements

✓Documented diagnosis of chronic osteomyelitis
✓Evidence of multifocal bone involvement beyond single site
✓Specific anatomic identification of left humerus
✓Laboratory evidence of infection (ESR, CRP, cultures)
✓Imaging studies demonstrating osteomyelitis changes
✓Comprehensive treatment history and current therapy
✓Documentation of any surgical interventions
✓Assessment of functional limitations and prognosis

Commonly Confused Codes

M86.321 — Chronic multifocal osteomyelitis, right humerus (wrong laterality)M86.622 — Other chronic osteomyelitis, left humerus (lacks multifocal component)M86.422 — Chronic osteomyelitis with draining sinus, left humerus (different type)M86.522 — Other chronic hematogenous osteomyelitis, left humerus (different pathogenesis)

Code Hierarchy

└M86Osteomyelitis └M86.3Chronic multifocal osteomyelitis └M86.32Chronic multifocal osteomyelitis, humerus └M86.322Chronic multifocal osteomyelitis, left humerus

└M86.322Chronic multifocal osteomyelitis, left humerus