An emergency room is required to stabilize any human being that walks through their doors. This would be so for citizens who have no money and illegals who have no money.
The law is called EMTALA, Emergency Medical Treatment and Labor Act. They must treat and stabilize. They seek payment only afterwards and if there is no ability to pay through any program, the hospital is stuck. They deal with this via higher prices on those who can pay.
I’m not talking about ERs. I’m talking about the who damn family dropping buy to say hi to grandma.