How to refuse Ambulance trips to ER?

I've had several seizures over the past few years where I regain consciousness soon enough that a paramedic hasn't yet arrived but before I am not fully coherent until after I reach the hospital. My insurance has a high deductable for going to the emergency room, so I really don't want to go.

Each time that I've had a seizure, I have tried to refuse to let the paramedics take me to the hospital. After having a seizure, I just want to stay where I am and rest until I can get up and go on with lift. But they insist on doing it as a precaution. The paramedics standard procedure is to ask me a battery of questions over and over again. At first, I can hear them and understand them and can picture who the president is but I can't speak. Eventually I get to a point where I can barely speak but can remember his name (so the best that I can answer is something like "big ears, black") and can't remember whether they've asked me this question already. Eventually I am coherent enough (by the time that we reach the hospital) that I can say "I don't want to go, I don't need to go" but they take me in anyway

How do I stop them? At what point are they no longer allowed to insist on taking me?