> go to an ER (can't be turned away)

This won’t work too well for most stuff. They don’t have to treat anything you present with, and don’t have to fully treat even e.g. a heart attack. They just have to stabilize you. So they can turn you away under most medical circumstances. Like you’re not going to get free chemo or (non-emergency) prenatal care or what have you. They also can triage you into the “maybe in twelve hours… maybe” group until you go away if you don’t seem like you’re dying, or likely to pay.