Leonard "Bones" McCoy, USS Enterprise NCC-1701/-A (TOS)
Beverly Crusher, USS Enterprise NCC-1701-D/-E (TNG)
T'Ana, USS Cerritos NCC 75567 (LD)
Emergency Medical Hologram Mk. I, while there are many instantiations this one's presumably "the Doctor," USS Voyager NCC-74656/(-A) VOY/(+PRO, eventually)
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