Idiopathic aseptic necrosis of right radius

This code signifies the spontaneous death of bone tissue in the right radius due to a lack of blood supply, without an identifiable cause such as trauma, infection, or medication. This condition, also known as osteonecrosis or avascular necrosis, leads to bone collapse and joint destruction if left untreated.

Apply this code when documentation explicitly states idiopathic aseptic necrosis affecting the right radius. Supporting clinical findings often include imaging reports (e.g., MRI, X-ray) confirming osteonecrosis and a thorough workup ruling out secondary causes.

• Ensure documentation specifies "idiopathic" or "aseptic" and clearly identifies the right radius.
• Distinguish from traumatic osteonecrosis, which would be coded differently.
• Do not use for osteonecrosis due to known causes like steroid use or sickle cell disease; these require specific secondary osteonecrosis codes.