Osteonecrosis due to previous trauma of left radius

This code signifies the death of bone tissue in the left radius, specifically caused by a prior traumatic injury to that bone. This condition, also known as avascular necrosis, results from an interruption of blood supply to the bone.

Apply this code when documentation clearly states osteonecrosis of the left radius and explicitly links its etiology to a previous traumatic event. This is appropriate for patients presenting with pain, limited range of motion, or imaging findings consistent with avascular necrosis following a fracture or other significant injury to the left forearm.

• Ensure the documentation specifies "left" radius; laterality is critical.
• Confirm the osteonecrosis is explicitly attributed to "previous trauma" and not other causes (e.g., steroid use, idiopathic).
• Consider sequencing this code after any acute fracture codes if the trauma is recent and the osteonecrosis is a developing complication.