Generally, an anesthesiologist is considered a medical doctor who, after medical school and internship, specializes in all types of anesthesia, including general anesthesia. Anesthesiologists have at least four years of training after medical school; and many have more. It is the anesthesiologist's job to keep you safe and comfortable during surgery and recovery from anesthesia. Once you enter the operating room, the anesthesiologist never leaves your side until you are safe and stable in the postanesthesia care unit. Unfortunately, others providers today that have much less medical training are also referring to themselves as "anesthesiologists" Be sure to ask if your provider went to medical school.