Duties:

Medical practitioner who was directly in charge of the sickbay or infirmary

Post Holders:

- Phlox (Enterprise NX-01)
- Sarah April (USS Enterprise)
- Phil Boyce (USS Enterprise)
- Mark Piper (USS Enterprise)
- Joseph M'Benga (USS Enterprise)
- Leonard McCoy (USS Enterprise & USS Enterprise-A)
- Beverly Crusher (USS Enterprise-D)
- Katherine Pulaski (USS Enterprise-D)
- Julian Bashir (Deep Space 9 & USS Defiant)
- The Doctor (USS Voyager)
- Elizabeth Lense (USS Lexington)
- Noum (USS Dauntless)
- Ohk (USS Titan)
- T'Ana (USS Cerritos)