M89.55Non-Billable (Header)Osteolysis, thighChild CodesM89.551Osteolysis, right thighM89.552Osteolysis, left thighM89.559Osteolysis, unspecified thighCode Hierarchy└M89Other disorders of bone└M89.5Osteolysis└M89.55Osteolysis, thigh└M89.55Osteolysis, thigh