Osteonecrosis due to previous trauma, unspecified toe(s)

This code signifies the death of bone tissue in an unspecified toe, specifically attributed to a prior traumatic injury. This condition, also known as avascular necrosis, results from an interruption of blood supply to the bone, leading to bone collapse and potential joint destruction.

Use this code when documentation clearly indicates osteonecrosis in any toe, and the etiology is directly linked to a past traumatic event. This diagnosis is typically supported by imaging studies (e.g., X-ray, MRI) showing bone necrosis and a patient history detailing a relevant prior toe injury.

• Ensure the documentation explicitly states "due to previous trauma" to differentiate from other causes of osteonecrosis.
• Avoid using this code if the specific toe (e.g., great toe, lesser toe) is identified; instead, use a more specific M87.27- subcategory.
• Code any associated pain or functional impairment separately, if documented.