They can be garnished, but it has to be by court order. have you tried to work out payment arrangements with them?
If you qualify, most hospitals have a hardship-type of program that you can get on, as far as paying the bill. My brother had to do this after his wife had a stroke. He went to the hospital in person and talked with their patient advocate, or some person to that effetct.
I paid for years and years on hospitals and doctors when my son was small with his medical problems. They were usually the ones easiest to work with.
I had a call the other day about the balance on my older sons account. I told her he was on disability and couldn't afford but ten dollars a month. She said that they had to have twenty five, or they would start collections. Then in a really soft voice, she told me that if I sent that in, they usually would not do anything. So that's what I started doing..karen