you go and talk to them saying you cannot pay as you don't have enough money to pay. Ask them if they have some charity or something like that. usually most hospitals do have such things. They may ask for verification like paycheck these thing.

my fren got 1900 bill for minor operation and was getting bills n bills asking him to pay and later he went through the similar process and now the hospital waived his bill fully after 8-9 months.