We have a sliding dress code depending on the clinic. Except noone ever wears scrubs anywhere, they think that looks sloppy. Unless you're in your surgery rotation, then it's allowed.
Sim Clinic: If you're with the operative faculty, whatever you want to wear. If you're with Prosth, you have to wear slacks, collared shirts or the equivalent for women.
Live Patients: Shirt and Tie for guys, equivalent for women.
Lecture: Whatever you darn well please.