I think you said the opposite if what you meant to say there, Doug: "NO ONE who shows up sick or injured at an Emergency Room at any hospital in the United States cannot be turned away without treatment."

What Maryff wrote there fits with my understanding of the situation, which underlay what I wrote.

If you turned up to an emergency room here with a life threatening condition you would definitely be referred on to get the kind of continuing medical help that you needed, over and above any immediate emergency help you might need.

But accident and emergency services are not the way most people with serious illnesses get help under the NHS. The normal way is for people to consult their family doctor, who refers them for specialist help, if that's what is needed. I imagine that's the same way as in America - except that here it doesn't involve paying anything, or making an insurance claim.