Chronic osteomyelitis with draining sinus, unsp humerus

This code signifies a persistent, long-standing infection of the humerus bone that has developed a draining tract or fistula to the skin surface. The infection is not specified as to its laterality (left or right humerus). This condition often involves recurrent inflammation and discharge.

Apply this code when documentation clearly indicates chronic osteomyelitis affecting an unspecified humerus, and a draining sinus is present. Supporting documentation should include physician notes detailing the chronicity of the infection, the specific bone involved (humerus), and the presence of a draining sinus.

• Ensure documentation specifies "chronic" osteomyelitis and the presence of a "draining sinus."
• Avoid using this code if laterality (left or right humerus) is documented; instead, use the more specific M86.421 or M86.422.
• Do not confuse with acute osteomyelitis (M86.0-M86.3) or osteomyelitis without a draining sinus.