Several characters in the history of G.I. Joe are doctors:
G.I. Joe Team
- Doc (Carl Greer) - the pacifist medic in the early years of the A Real American Hero series.
- Doc (Carla Greer) - the previous character's niece.
- Dr. Link Talbot the zoologist who joined the Joes in during Valor vs. Venom.
- Dr. Venom - Cobra's original mad scientist in the A Real American Hero comics continuity.
- Dr. Mindbender - the bald scientist with the mustache and the monocle in the A Real American Hero series. Also known as "Dr. Brainwave."
- Dr. Knox - the female Cobra scientist who took over when Mindbender was unavailable.
- The Doctor - the mysterious operative from 2009's Rise of Cobra.
Many civilian doctors were pulled into the conflict, on both the Joe and Cobra side of the battle.
- Dr. Adele Burkhart - an anti-war activist in the A Real American Hero comics continuity.
- Dr. Vandermeer - the inventor of the M.A.S.S. Device in the A Real American Hero animated continuity.
- Dr. Renault, inventor of the Matter Transmutor.
- Dr. Emil Mettier in Countdown for Zartan
- Dr. Shakur in Jungle Trap
- Dr. Johannsen and Dr. Entwhistle in Haul Down the Heavens
- The unnamed bacteriologist in The Germ
- Dr. Blackstone in Spell of the Siren
- Dr. Hibbentrope in The Funhouse
- Dr. Morita in Cobra Quake
- Dr. Massey in Primordial Plot
- Dr. Nancy Winters in Hearts and Cannons
- Dr. Marsh in The Gods Below
- Dr. Hamler in The Pit of Vipers
- Dr. Windigos in Iceberg Goes South
- Dr. Jeremy Penser in My Brother's Keeper
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