ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.4 > M86.42 M86.42 Chronic osteomyelitis with draining sinus, humerus Non-Billable/Non-Specific Codes M86.421Chronic osteomyelitis with draining sinus, right humerusM86.422Chronic osteomyelitis with draining sinus, left humerusM86.429Chronic osteomyelitis with draining sinus, unspecified humerus