Other secondary osteonecrosis, left finger(s)

This code signifies the death of bone tissue in one or more fingers of the left hand due to a cause other than primary osteonecrosis. This condition results from an interruption of blood supply to the bone, leading to bone collapse and potential joint destruction.

Apply this code when documentation specifies osteonecrosis affecting the left finger(s) and clearly indicates a secondary etiology (e.g., trauma, steroid use, systemic disease). Supporting documentation should detail the affected finger(s) and the underlying cause if known.

• Ensure the documentation specifies "left" finger(s) and not the right or unspecified hand.
• Distinguish from primary osteonecrosis (M87.0-) and osteonecrosis due to previous trauma (M87.1-).
• Code the underlying secondary condition first, if applicable, followed by this code.