ICD-10-CM > M00-M99 > M86-M90 > M89 > M89.5 > M89.55 M89.55 Osteolysis, thigh Non-Billable/Non-Specific Codes M89.551Osteolysis, right thighM89.552Osteolysis, left thighM89.559Osteolysis, unspecified thigh