Other secondary osteonecrosis, right tibia

This code signifies the death of bone tissue in the right tibia due to an underlying condition, rather than a primary cause. This osteonecrosis is not idiopathic and is a consequence of another disease process, trauma, or medical intervention affecting the bone's blood supply.

Apply this code when documentation specifies osteonecrosis of the right tibia that is clearly secondary to another condition, such as corticosteroid use, sickle cell disease, lupus, or radiation therapy. The medical record must explicitly state the secondary nature and the affected bone.

• Ensure the documentation specifies "secondary" osteonecrosis; otherwise, consider primary osteonecrosis codes.
• Always code the underlying cause of the secondary osteonecrosis first, if known and documented.
• Laterality (right) is crucial; verify the affected tibia before assigning this code.