Other osteonecrosis, right femur

This code signifies the death of bone tissue in the right femur due to a loss of blood supply, not otherwise specified as spontaneous, drug-induced, or post-traumatic. This condition can lead to bone collapse and subsequent arthritis if left untreated. It represents a form of avascular necrosis affecting the femoral bone.

Use this code when documentation clearly indicates osteonecrosis of the right femur, and the etiology is not specified as spontaneous, drug-induced, or post-traumatic. This applies to cases where the physician has diagnosed avascular necrosis of the right femur but has not identified a specific cause from the more specific M87 subcategories. Supporting documentation would include imaging reports (MRI, X-ray) confirming osteonecrosis and physician notes detailing the affected site.

• Ensure the documentation specifies "right femur" to avoid laterality errors.
• Review the medical record for more specific etiologies (e.g., drug-induced, post-traumatic) that would necessitate a more precise M87 subcategory.
• Do not use this code if the osteonecrosis is explicitly stated as spontaneous (M87.0), drug-induced (M87.1), or due to previous trauma (M87.3).