M89.53Non-Billable (Header)Osteolysis, forearmChild CodesM89.531Osteolysis, right forearmM89.532Osteolysis, left forearmM89.539Osteolysis, unspecified forearmCode Hierarchy└M89Other disorders of bone└M89.5Osteolysis└M89.53Osteolysis, forearm└M89.53Osteolysis, forearm