CS -> Pre-med major switch = possible?

" However, the only school I am considering in Washington is UWash, which has a good pre-med program but nothing else. Because of this, if I ever end up dropping out of pre-med, I will have no other reliable major to fall back on because UWash is not great at many things."

There’s a lot of bad presumptions there. It sounds like you’re REALLY hung-up on prestige, and that’s not a healthy attitude to have when choosing a college. Going to California out of state costs around $65,000 a year. Have you talked to your parents about cost? Most don’t have $300,000 lying around for an all-expense paid trip to your favorite university. And you’re not going to get that kind of financing to go to these schools.

Whether you go to medical school or choose technology(I work in that field), prestige won’t matter. You need to keep the debt down. If you choose tech, by the time you’re making enough to drive a Mercedes, your student loans will be long paid off. You’ll be making a relatively modest salary for the first several years as you gain experience.

You may be right, in a way about UW. Their CS program is actually very good, and it’s hyper-competitive. There’s a good chance you might not get in. Therefore you should consider Washington State, since it’s less competitive. I guarantee, employers aren’t going to care as long as you know how to do the job.