Idiopathic aseptic necrosis of left hand

This code signifies the spontaneous death of bone tissue in the left hand due to a lack of blood supply, without an identifiable cause such as trauma, infection, or systemic disease. This condition leads to bone collapse, pain, and potential joint dysfunction.

Apply this code when documentation clearly indicates avascular necrosis (AVN) affecting the left hand, and the etiology is determined to be idiopathic. Supporting documentation should rule out secondary causes of AVN, such as steroid use, sickle cell disease, or trauma.

• Ensure the laterality (left hand) is explicitly documented.
• Confirm the "idiopathic" nature; if a cause is identified, a more specific code for secondary AVN should be used.
• Do not confuse with osteonecrosis due to trauma (S62.-) or other specified causes (M87.1-M87.3).