Whether she is pre-med or not, many colleges want students who have completed at least three years of the same foreign language, and a fourth year is strongly appreciated by many. (In many cases for a student who started in middle school with that language, that would take the student through the AP level.)
With respect to Latin, if the teacher is fabulous, perhaps it is worth doubling up and taking it as an additional language. D did that, but our H.S. had one of the very best Latin teachers you could imagine, with bunches of students who won gold medals in the National Latin exams. I don’t think a lot of the Latin she learned would have helped much for medicine. I don’t remember body parts being a particularly significant emphasis in the standard Latin curriculum.