Osteonecrosis due to previous trauma, unspecified finger(s)

This diagnosis code signifies the death of bone tissue in an unspecified finger, resulting from a prior traumatic injury. This condition, also known as avascular necrosis, occurs when blood supply to the bone is disrupted, leading to bone collapse and potential joint destruction.

This code is appropriate for cases where a patient presents with osteonecrosis of an unspecified finger, and the medical record clearly links the condition to a documented history of trauma to that digit. Documentation should specify the finger is affected but not provide enough detail to specify a particular digit (e.g., "finger osteonecrosis" without specifying index, middle, etc.).

• Ensure the documentation explicitly states "previous trauma" as the etiology for the osteonecrosis.
• Avoid using this code if a specific finger (e.g., index, middle, ring, little) is identified; instead, use the more specific code for that digit.
• Consider sequencing this code after an external cause code (V00-Y99) if the original trauma is still relevant and being treated.