Students intending to go to medical school typically choose a bachelor's degree in a field like:
* Biology
* Chemistry
* Biochemistry
* Physics
* Psychology
* Other related science majors (e.g., Neuroscience, Biomedical Engineering) and sometimes even humanities majors.
Many online universities offer these undergraduate degrees. To find one, you should search for online programs in these subjects. Keep in mind that medical schools scrutinize the rigor of your undergraduate coursework, so choose an accredited institution with a strong science program. Look for regionally accredited universities. Not all online programs are created equal in terms of quality and acceptance by medical schools.
After completing your bachelor's degree in one of these fields *and* completing the required pre-med coursework (typically including specific science courses like organic chemistry, biology, physics, and potentially others), you will then apply to medical school.