Osteonecrosis due to drugs, left finger(s)

This code signifies the death of bone tissue in one or more fingers of the left hand, specifically caused by the use of certain medications. This condition can lead to pain, joint dysfunction, and potential collapse of the affected bone.

Apply this code when documentation clearly indicates avascular necrosis of the left finger(s) and explicitly links the etiology to drug therapy. This typically involves a history of corticosteroid use, bisphosphonates, or other medications known to cause osteonecrosis.

• Ensure the documentation specifies "left" finger(s) and clearly attributes the osteonecrosis to drug use.
• Do not use this code for osteonecrosis due to other causes (e.g., trauma, alcoholism, idiopathic); instead, select a more specific M87.1 subcategory.
• Sequence this code as a primary diagnosis when the drug-induced osteonecrosis is the reason for the encounter, or as a secondary diagnosis when it's a co-morbidity.