Doctor

There are a number of different uses of the term in the game:

USS Voyager's former Chef Medical Officer (EMH)
 * The Doctor

Promotional Bridge Officer available to attendees of Star Trek convention
 * Doctor (Bridge Officer)

Medical department Duty officer specialization
 * Specialization: Doctor
 * Specialization: Doctor/Starfleet
 * Specialization: Doctor/KDF
 * Specialization: Doctor/Romulan Republic

NPC stationed at the Sick bay on the Ship's interior map
 * Starfleet Doctor
 * Klingon Doctor