M87.05Idiopathic aseptic necrosis of pelvis and femur

M87.05 is the ICD-10-CM diagnosis code for idiopathic aseptic necrosis of pelvis and femur. It belongs to category M87 (osteonecrosis), block M86-M90 (other osteopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within M87.0 (idiopathic aseptic necrosis of bone), M87.05 is specifically for idiopathic aseptic necrosis of pelvis and femur. Related codes cover unspecified bone (M87.00), shoulder (M87.01), humerus (M87.02), radius, ulna and carpus (M87.03), hand and fingers (M87.04), tibia and fibula (M87.06), ankle, foot and toes (M87.07), other site (M87.08) and 1 more.

To report this condition, pick the subcode that matches the documentation: M87.050 (pelvis), M87.051 (femur), M87.052 (femur) and M87.059 (femur).

Use an additional code to identify major osseous defect, if applicable (M89.7-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.