CS -> Pre-med major switch = possible?

You would be a great candidate for this program at UDub
https://ischool.uw.edu/programs/informatics/degree-options#bhi

A major like this would give you excellent employment options, if you decided against med school or if you decided to work for a few years before med school. The latter option can be excellent, because you can postpone MCAT prep until after you graduate and also gain valuable life and work experience that can make you a stronger med school applicant. Plus, medical education is a long haul; a break from being a student can be a very healthy thing.

There are bioinformatics, computational biology, data analytics, and similar majors at many colleges, but UW’s Informatics school is particularly robust and well-regarded.