Huh. My doctor's office is in a huge building with lots of other offices in it, and a lab, etc. There are public restrooms in the main part of the building across from the elevators, but my doctor's office has at least two bathrooms (each with a toilet & a sink) in it. I think the examination rooms might have small sinks in them too, but I can't remember (which is sad considering how many times I've been in them!). When I went to the specialist for my extra ultrasounds the ultrasound rooms actually had bathrooms attached to them! I didn't have to give a sample that time but I needed to pee anyway lol.