Osteonecrosis due to previous trauma, right fibula

This code signifies the death of bone tissue in the right fibula resulting from a prior injury. This avascular necrosis impairs the bone's structural integrity and can lead to pain, collapse, and joint dysfunction. It specifically indicates that the etiology of the osteonecrosis is a past traumatic event.

Apply this code when documentation clearly states osteonecrosis of the right fibula and explicitly links its cause to a previous trauma. This is appropriate for patients presenting with symptoms of bone death in the fibula following a history of fracture, dislocation, or other significant injury to the area. Ensure the physician's notes confirm the traumatic etiology.

• Always verify the specific bone affected (fibula) and the laterality (right).
• Distinguish from osteonecrosis due to other causes (e.g., steroids, alcoholism) by carefully reviewing the etiology documented.
• Code any associated pathological fracture of the fibula separately, if present.