I agree that black is fine. From my experience in the hospital and around physicians, the name of the game is to be conservative (no seersucker or neon leisure suits), but stylish and professional enough to be memorable or maybe better yet unmemorable.
I think your idea of a black/conservative suit with a strong tie is a good idea. It shows you pay attention to detail, makes you appear professional, and also makes you appear competent. Plus, it also shows you can run with the herd and are part of the "team." Patch Adams got away with the hawaiian shirt -- however, I don't think most of us would.
The head of the dept of surgery (also head of neurosurgery, Harvard trained) once told me that in medicine you need to wear your Shaman clothes. Would you see a medicine man wearing levi's and a ragged t-shirt.? Then do you want to see an oncologist who's going to treat your potentially terminal cancer in khakis and a polo?
I know you didn't suggest this and I'm going into more detail than you asked for. I'm just sharing about how I think about clothing for interviews, when a suit/sport coat is required for clinic (Mayo rule), and how you dress at professional conferences.
The suit is a tool that you can make work for you. Why not wear a "tool" that says give me the job; show me the money; or whatever you're trying to say?
But I'd never wear a bow-tie. And don't forget to shine your shoes.
