You definitely can, but you might have to take a few courses just to show that you have a small background in the health field. Every graduate school has different requirements. I’d talk to the admissions department at the graduate schools you are looking at and see what advice they have. Example from my own experience: I’m desperately trying to minor in art history just to keep that open as an option for graduate school. I know most of the schools I’d want to go to graduate school for art history at require at least a small basis of understanding in the subject. They just don’t want to have graduate students who get halfway through the program and realize it’s not for them, understandably so. Anyways, main point: Talk to a few universities and see what the health departments say! They often like it when people come from diverse undergraduate backgrounds so you have that going for you. Good luck!