I dunno - my ex burned all the skin off his hand once, the first question at the emergency room was "how are you paying?" and we waited there 5 hours before they saw him, during which time it got so much worse he ended up needing more treatment & therapy. No we didn't have insurance or money back then. They eventually arranged temporary Medicaid for him as he couldn't work with the hand so burned. Which left us without his income (I had just given birth too) so without much food.

Anyway - this was in the 1990s but I am absolutely sure we had to wait because we could not pay, even though it was an obvious emergency.