There are quite a few merit scholarships that are open to anyone with excellent grades. I am quite sure that more than a few caucasian males have been awarded these as at my school, the four of us who had full-rides were of different ethnicities including white male.
Since you came to an Underrepresented in Healthcare Forum, to ask about scholarships for an ethnicity that isn't "underrepresented" in healthcare, one would wonder what your motives might be? A better course of action would be to seek the assistance of the Financial Aid department at your medical school to determine what scholarships might be open to you if you are a white male. Good luck with your search!