Can a hospital take money out of your bank account if you have no health insurance?

I can only assume this is in America? In the UK, we pay National Insurance, which entitles us to have free National Health Care, free of charge at the point of need. I also assume that (even in America?) you would need to give your bank details to enable the hospital to extract (with your permission?) to cover medical costs! In the UK, most people can't understand why a person in medical need can be refused medical help!