If you (somehow) end up requiring the services of an alien doctor, ask for their equivalent of a veterinarian, especially if said aliens have never seen a human. Vets are used to treating all sorts of different species and won’t be confused or intimidated by unfamiliar anatomy.
I always think this should end with “WHY DO I HAVE A FORESKIN?”
If you (somehow) end up requiring the services of an alien doctor, ask for their equivalent of a veterinarian, especially if said aliens have never seen a human. Vets are used to treating all sorts of different species and won’t be confused or intimidated by unfamiliar anatomy.