What should I major in within these fields: Medical, Computers, and Philosophy?

Adding what the previous response said about going premed; if computer programming is more interesting than the excessively long premed requirements, you could still have a future as a computer programmer for medical software. Hospitals in developed countries have digital medical records and there's still a lot of issues of existing software having loopholes to make someone hack them or are too complicated for many people to use for the first time.