I’ve got a friend who actually has insurance through her employer (although I’m sure everyone has seen how excessively crummy that has become). She had to go to the ER for a lung problem that turned out to be pleurisy. She was at the ER for four hours, and they took a CT scan. Bill came back for $13,000 and that didn’t include the bill for the scan. So right off the bat she’s responsible for almost $3,000 and is still waiting for the other bill.
She would have been better off showing up to the ER without ID and claimed to be "undocumented". She would not have been charged for anything, and she could not be turned away by law.