What is the name of the holographic doctor on Voyager?

The holographic doctor on Voyager is known simply as The Doctor.

He is an Emergency Medical Hologram, or EMH, played by Robert Picardo. The program was designed as a temporary replacement for a starship’s medical staff, but Voyager’s chief medical officer was killed when the ship was thrown into the Delta Quadrant. The EMH was therefore activated and became the crew’s permanent physician.

The Doctor was originally confined to sickbay, holodecks, and other areas with holographic equipment. His later acquisition of a mobile emitter allowed him to move freely around Voyager and develop a much broader life beyond emergency treatment. Over the series, he becomes an artist, performer, teacher, and advocate for the rights of holographic beings.

Lewis Zimmerman is not the Doctor’s name; Zimmerman is the human programmer whose appearance and medical knowledge form the basis of the Mark I EMH design. Vic Fontaine is a different holographic character from Deep Space Nine, while Moriarty is a sentient holodeck creation from The Next Generation. The Doctor’s standard activation line is, “Please state the nature of the medical emergency.”