if you have no insurance then you are free to negotiate with the hospital and ER physician directly.
I would certainly expect the physician to take what amount you offer...I would start at about $300 and max at $500. If you call them and say the you have no insurance but are willing to pay today with a credit card, I can almost guarantee that they will take you offer.
Use the same tactic with the hospital, but since they are a large bureaucracy it may be more difficult.
Also, tell them you are willing to pay what medicaid rates are...which they also accept....why should you pay more than they would otherwise accept
Also...next time DIY with ice and superglue