Hospitals in US can't turn you down if you are taken to an emergency room. It's the law. They have to do the treatment even you don't have a single penny. Later, they send the bill after treatment is over. So, why asking for donation? To pay that hospital bill? If you don't have money, set up a payment plan or just don't pay. 
If the situation is different then what I am imagining, please explain how the funds are going to be used. My sympathy with the patient, hope you recover soon!