ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.6 > M86.63 M86.63 Other chronic osteomyelitis, radius and ulna Non-Billable/Non-Specific Codes M86.631Other chronic osteomyelitis, right radius and ulnaM86.632Other chronic osteomyelitis, left radius and ulnaM86.639Other chronic osteomyelitis, unspecified radius and ulna