Chronic multifocal osteomyelitis, multiple sites

This code signifies a persistent, widespread infection of bone and bone marrow affecting multiple distinct anatomical locations. It indicates a long-standing inflammatory process within the bone tissue that is not confined to a single site.

Apply this code when documentation specifies chronic osteomyelitis impacting more than one bone or bone region. Supporting documentation should clearly indicate the chronicity of the infection and involvement of multiple, non-contiguous sites.

• Ensure documentation explicitly states "chronic" and "multifocal" or "multiple sites."
• Do not use for acute osteomyelitis or osteomyelitis confined to a single site.
• Code also the infectious organism, if known, as an additional diagnosis.