Had the same experience with my son's ear infection on a holiday weekend. Received a bill for $900. I refused to pay it, I wrote them and said I had asked to receive an itemized list of charges for a typical ear infection and had been refused and that if these prices were known at the time of the service I wouldn't've undertaken the service.

So of course they came down to $450 without even batting an eye. Complete madness. I've still never paid it, with no apparent consequences.