I had to pay $1000 for a CAT scan. ****ing ridiculous. And you don't find out until you get a bill in the mail weeks later. No-one says "go get this done it's going to be $X", they just send you. Same with x-rays at the dentist. I've been burned there too.
Tip: Unless your life is in danger, NEVER call an ambulance. That's $1000 right there. Before you even get to the hospital. Take an Uber.