Osteonecrosis due to previous trauma, left finger(s)

This code signifies the death of bone tissue in one or more fingers of the left hand, specifically attributed to a prior traumatic injury. This condition, also known as avascular necrosis, results from an interruption of blood supply to the bone following the trauma, leading to bone collapse and potential joint destruction.

Assign this code when medical record documentation clearly states osteonecrosis of the left finger(s) and explicitly links its etiology to a previous traumatic event. Supporting documentation should include a history of trauma to the affected finger(s) and diagnostic imaging (e.g., X-ray, MRI) confirming avascular necrosis.

• Ensure the documentation specifies "left" finger(s) and not just "finger(s)" or "hand."
• Verify that the osteonecrosis is explicitly stated as being "due to previous trauma" to differentiate from other etiologies.
• Consider sequencing this code after an acute injury code if the trauma is recent and the osteonecrosis is a direct, subsequent complication.