I've visited emergency multiple times over the 20+ years I've been living in Australia. The first time I left with crutches, a casted ankle, and a whole slew of scans indicating it was just a serious sprain, not a bone break or tissue tear. I was almost out of emergency before I turned around and uncomfortably announced that I was leaving and yet hadn't paid for anything. A doctor came directly over, pressed the button for the automatic doors, and said "It's ok, this isn't America. You're free to leave, and you don't owe us any payment. Your taxes cover this."
I have severe spinal stenosis. On Tuesday I had an EOS scan. $0. Last year I had both an MRI and CT scan. Both cost me nothing and were covered by the public health system. If I had these 3 scans done in the US without private health care I'd be out of pocket $10k or more.