Osteonecrosis due to drugs of left radius

This code signifies the death of bone tissue in the left radius, specifically attributed to the adverse effects of medication. This condition, also known as avascular necrosis, results from an interruption of blood supply to the bone, leading to bone collapse and potential joint destruction.

Apply this code when documentation explicitly states osteonecrosis of the left radius and clearly links its etiology to drug use. This typically involves patients on long-term corticosteroid therapy, bisphosphonates, or other medications known to cause avascular necrosis. Supporting documentation should include imaging reports (e.g., MRI, X-ray) confirming osteonecrosis and a physician's note detailing the drug-induced cause.

• Ensure the documentation specifies "left radius" and not a general upper limb or unspecified radius.
• Verify that the physician's notes clearly establish a causal link between drug therapy and the osteonecrosis.
• Do not confuse with osteonecrosis due to other etiologies (e.g., trauma, alcoholism), which have different code assignments.