Voadam
Legend
Haha nice!
I have done a bunch of gothic horror themed stuff so plague doctors and mad scientist doctors have come up.
In one game where I was using recognizable characters as NPCs the party was getting information from Jerry Lewis the top alchemical professor at Lepidstadt University. One PC caught the allusion and offered him some snack nuts as a friendly gesture as they were eliciting plot points relevant to their investigation. Lewis thanked him and lectured about the development of military drugs the university was developing when he started going into anaphylactic shock, cutting off his divulging of plot info (5e's success now on a failed skill roll for complication later optional rule kicking in) so the characters shouted out for a doctor, knowing the medical school wing was not far down the hall from the Alchemy department. So steampunk Jodi Whittaker showed up saying she was a doctor.
In my 5e conversion of the Iron Gods adventure path (which is an ancient crashed space ship and localized supertech and post-apocalypse areas in D&D world AP) there was a hobgoblin cleric focused on undead in the original. I reskinned her to be a Necro-Surgeon which worked well as a sort of MASH WWII/Korean War medical camp mash up with fantasy undead creation. The campaign has also had riffs on Star Trek's emergency hologram program and Paranoia's doc bots.
I don't think a lot about the big picture medical system of the fantasy world, but I have had medical stuff worked in as discrete setting elements multiple times and they felt right for the game and the game world feel I was going for.