In my experience, ER in the US can bill you at the highest rate pretty frivolously. I've been in the ER for "difficulty breathing", which was billed at the hig

In my experience, ER in the US can bill you at the highest rate pretty frivolously. I've been in the ER for "difficulty breathing", which was billed at the highest level, although still made to wait ~2 hours in waiting rooms before seeing _any_ medical professional. I've also been in the ER when brought in by an ambulance, in which case I was seen immediately. These were both billed at the highest level, when the 1st case clearly shouldn't have been.