Osteonecrosis due to drugs, right humerus

This code signifies the death of bone tissue in the right upper arm bone (humerus) 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 its collapse and potential joint destruction.

Apply this code when documentation clearly states osteonecrosis of the right humerus and explicitly links its etiology to drug therapy. Common drug culprits include corticosteroids, bisphosphonates, and certain immunosuppressants. The physician's notes should confirm the affected bone and the drug-induced nature of the condition.

• Ensure the laterality (right humerus) is clearly documented.
• Do not use this code for osteonecrosis due to other causes (e.g., trauma, alcoholism); specific codes exist for those etiologies.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity being managed.