ICD-10-CM > M00-M99 > M86-M90 > M86 > M86.2 > M86.27 M86.27 Subacute osteomyelitis, ankle and foot Non-Billable/Non-Specific Codes M86.271Subacute osteomyelitis, right ankle and footM86.272Subacute osteomyelitis, left ankle and footM86.279Subacute osteomyelitis, unspecified ankle and foot