The American Medical Service was an organization that had a database of surgeons and other medical personnel.
Day 1 Edit
During the post-mortem of Alan York, Perry Tanaka and Nina Myers found a custom-made surgical pin in his ankle. Jamey Farrell then suggested searching the AMA database to trace the surgeon who planted it, and a short while later her hunch paid off - they used the surgeon's records to identify the body. ("Day 1: 5:00am-6:00am")