ICD-10-CM > M00-M99 > M86-M90 > M89 > M89.5 > M89.57 M89.57 Osteolysis, ankle and foot Non-Billable/Non-Specific Codes M89.571Osteolysis, right ankle and footM89.572Osteolysis, left ankle and footM89.579Osteolysis, unspecified ankle and foot