Osteonecrosis due to previous trauma, left foot

This code signifies the death of bone tissue in the left foot resulting from a prior traumatic injury. This avascular necrosis (AVN) occurs when blood supply to the bone is disrupted, leading to bone collapse and potential joint destruction.

Apply this code when documentation explicitly states osteonecrosis of the left foot and clearly links its etiology to a previous traumatic event. This includes conditions like Freiberg's disease or other post-traumatic AVN affecting the metatarsals, tarsals, or phalanges of the left foot.

• Ensure the documentation specifies "left foot" and a clear causal link to "previous trauma."
• Do not use this code for osteonecrosis due to current trauma; instead, use codes from the S92 category for current fractures.
• Consider additional codes for the specific traumatic injury if still relevant, or for any associated complications.