M87.0Idiopathic aseptic necrosis of bone

M87.0 is the ICD-10-CM diagnosis code for idiopathic aseptic necrosis of bone. 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 10 subcodes must be used instead.

Within M87 (osteonecrosis), M87.0 is specifically for idiopathic aseptic necrosis of bone. Related codes cover due to drugs (M87.1), due to previous trauma (M87.2), other secondary osteonecrosis (M87.3), other osteonecrosis (M87.8) and unspecified (M87.9).

To report this condition, pick the subcode that matches the documentation: M87.00 (bone), M87.01 (shoulder), M87.02 (humerus), M87.03 (carpus), M87.04 (fingers), M87.05 (femur), M87.06 (fibula), M87.07 (toes) and 2 more.

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.