Chronic osteomyelitis with draining sinus, right femur

This code signifies a persistent, long-term infection of the bone marrow and bone tissue in the right femur, characterized by a draining sinus tract. The draining sinus indicates a chronic inflammatory process where pus and necrotic debris are continuously discharged to the skin surface.

Apply this code when documentation clearly states chronic osteomyelitis affecting the right femur, specifically noting the presence of a draining sinus. This is typically seen in patients with a history of trauma, surgery, or systemic infection where the bone infection has become established and is actively discharging.

• Ensure documentation explicitly states "chronic" and identifies the "right femur" as the affected site.
• Distinguish from acute osteomyelitis (M86.0-) or subacute osteomyelitis (M86.2-), which lack the chronicity implied by a draining sinus.
• Code any associated pathogens (e.g., B95-B97) as secondary diagnoses if identified and documented.