Are they testing for drugs? If so, then yes, it'll probably show up. If there not testing for drugs, then no. And either way, they cant tell anyone your results because of patient/doctor confidentiality. If they do they're in the wrong and can be struck off.

Doctors, well, most of them, know what they're talking about when it comes to drugs. Weed wont bother them. Wow, it gets you high, it's a plant. They wont do jack shit.