If someone calls an ambulance and you’re unconscious they will take you the hospital for treatment. You will be responsible for the bill. Including the thousands of dollars for the ambulance ride.
And no, even though you were unconscious and not able to consent to treatment willingly you will still be responsible for the bill. There are ways of dealing with it, but one accident is all it takes for a ruined credit score for some people. It is as fucked up as it sounds.
There are ways of waiving bills, getting financial assistance etc but it’s a total nightmare dealing with hospital billing departments