ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.3 > M86.33 M86.33 Chronic multifocal osteomyelitis, radius and ulna Non-Billable/Non-Specific Codes M86.331Chronic multifocal osteomyelitis, right radius and ulnaM86.332Chronic multifocal osteomyelitis, left radius and ulnaM86.339Chronic multifocal osteomyelitis, unspecified radius and ulna