Osteonecrosis due to drugs, right foot

This code signifies the death of bone tissue in the right foot, specifically 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 clearly states osteonecrosis of the right foot and explicitly links its etiology to drug use. This typically occurs in patients with a history of corticosteroid use, bisphosphonate therapy, or other medications known to cause avascular necrosis.

• Ensure the documentation specifies "right foot" and explicitly attributes the osteonecrosis to drug-induced causes.
• Do not use this code for osteonecrosis due to other etiologies (e.g., trauma, alcoholism, idiopathic); specific codes exist for those conditions.
• Sequence this code as a primary diagnosis when the drug-induced osteonecrosis is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.