Question: What’s the difference between a spinal allograft and an autograft? Ohio Subscriber Answer: If the surgeon harvests bone from the patient’s own body, you’ll code for an autograft with one of the following codes: Example: The surgeon removes a portion of bone from the patient’s rib through the same thoracic spinal exposure site, reshapes the bone as necessary, and grafts it onto the spine for reconstruction. For this autograft, report +20936 along with the code for the primary surgical procedure. The bone the surgeon uses during an allograft, however, comes from another human donor. For allografts, report one of these codes: Allograft clue: If operative notes indicate that the bone came from a bone bank, you’ll automatically choose an allograft code.