Osteonecrosis due to previous trauma, left toe(s)

This code signifies the death of bone tissue in the left toe(s) resulting from a prior traumatic injury. This condition, also known as avascular necrosis, occurs when the 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 toe(s) and clearly links its etiology to a previous traumatic event. This includes cases where the trauma led to vascular compromise or direct bone damage that subsequently resulted in avascular necrosis.

• Ensure the documentation specifies "previous trauma" as the cause; otherwise, a different etiology code may be more appropriate.
• Verify the affected side is explicitly documented as "left toe(s)."
• Distinguish from osteonecrosis due to current trauma (S92.91- series) or other non-traumatic causes (M87.1- series).