Chronic osteomyelitis w draining sinus, unsp radius and ulna

This code signifies a long-standing infection of the bone in an unspecified radius and ulna, characterized by a persistent tract or opening that allows pus or fluid to drain to the skin surface. This condition indicates a chronic inflammatory process within the bone marrow and cortex of the forearm.

Apply this code when documentation clearly indicates chronic osteomyelitis affecting either the radius or ulna, or both, without specifying which bone, and explicitly mentions the presence of a draining sinus. This typically follows a history of acute osteomyelitis or trauma, with ongoing purulent discharge from the affected area.

• Ensure the documentation specifies "chronic" osteomyelitis and the presence of a "draining sinus."
• If the specific bone (radius or ulna) is identified, a more specific code within the M86.43 series should be used.
• Always review for any associated conditions, such as pathological fractures, which would require additional coding.