Doctor Bist Fitzgerald (also known as Dr. Bist) was a male Human Starfleet officer who served as the original chief medical officer aboard the USS Voyager in 2371 under the command of Kathryn Janeway.

Before serving as CMO on Voyager, he served as the CMO on the Starfleet outpost on Caldik Prime, where he was stationed along with Tom Paris.

When Voyager departed Deep Space 9 to the Badlands, he performed physicals on Harry Kim, Typhuss James Halliwell and Paris, who had been recently assigned as conn officer, but didn't bother to hide his dislike of Paris in light of Paris's spotty record and imprisonment.

He later had a meal with Harry Kim and Typhuss James Halliwell in the mess hall before promptly leaving when Paris arrived. The chief medical officer was one of the casualties of Voyager's transport into the Delta Quadrant by the Caretaker, along with most of the medical staff. He was replaced as CMO by The Doctor, a Emergency Medical Hologram who worked with him in sickbay.

In VOY novella: The Badlands, Part III, Fitzgerald is referred to as Dr. Bist.