Also a routine internist appointment simply doesn't present the opportunities for billing fuckery going to be hospital for.
Again, going to get a physical isn't the same thing as going to the ER. You are not going to get bill shock from getting a physical. If you don't have insurance then CVS Minute Clinic has a fixed menu of prices and I think they can do a physical and at least some of the bloodwork that you're supposed to get as part of a physical (like cholesterol and blood sugar).