Imperial medic were specifically trained soldiers whose job was to tend to wounded stormtroopers. They stayed a little back from the front lines and could defend themselves with their blasters if needed. They participated in battles on contested planets such as Felucia, Kashyyyk and Raxus Prime.[source?] The Imperials also used the 2-1C medical droids.[1]
According to the novel The Clone Wars: Decide Your Destiny: The Lost Legion, Phase 1 clone trooper medics have their squad color markings on their armor, circles on their shoulder plates, and a thin stripe around their helmets. However, they may not have markings at all, for Kix in "The Deserter" doesn't have any on his armor. When Kix changes his Phase I clone trooper armor to Phase II, his new armor displays the clone trooper medic markings.