M89.56Non-Billable (Header)Osteolysis, lower legChild CodesM89.561Osteolysis, right lower legM89.562Osteolysis, left lower legM89.569Osteolysis, unspecified lower legCode Hierarchy└M89Other disorders of bone└M89.5Osteolysis└M89.56Osteolysis, lower leg└M89.56Osteolysis, lower leg