Osteonecrosis due to drugs, right finger(s)

This code signifies the death of bone tissue in the right finger(s) caused by the use of certain medications. 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 right finger(s) and identifies a drug as the causative agent. This typically occurs in patients with a history of corticosteroid use, bisphosphonate therapy, or other medications known to induce osteonecrosis.

• Ensure the documentation clearly specifies "right finger(s)" and not a general hand or multiple sites.
• Always sequence the drug-induced osteonecrosis code first, followed by an additional code from T36-T50 to identify the specific drug.
• Distinguish from osteonecrosis due to other causes (e.g., trauma, idiopathic), which are classified elsewhere.