What undergraduate degree do you need to become a physical therapist?

You need a Doctor of Physical Therapy (DPT) degree to become a physical therapist. This is a professional doctorate degree, and while it builds upon undergraduate coursework, it's not an undergraduate degree itself. You'll need a bachelor's degree *before* you can apply to a DPT program, but the bachelor's degree doesn't have to be in a specific major (though some prerequisite courses are generally required).