Osteonecrosis due to previous trauma of right radius

This code signifies the death of bone tissue in the right 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. It can lead to bone collapse and subsequent arthritis.

Apply this code when documentation clearly states osteonecrosis of the right radius and explicitly links its etiology to a previous traumatic event. This is typically supported by imaging studies (e.g., X-ray, MRI) confirming avascular necrosis and a history of trauma to the right forearm.

• Ensure the documentation specifies "previous trauma" as the cause, not current trauma or other etiologies.
• Verify laterality; this code is specific to the right radius.
• Do not use this code for osteonecrosis due to steroid use, alcoholism, or idiopathic causes; those have different specific codes.