ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.3 > M86.37 M86.37 Chronic multifocal osteomyelitis, ankle and foot Non-Billable/Non-Specific Codes M86.371Chronic multifocal osteomyelitis, right ankle and footM86.372Chronic multifocal osteomyelitis, left ankle and footM86.379Chronic multifocal osteomyelitis, unspecified ankle and foot