Joan Isaac Mohr
Vice President and Dean of Admissions
This site deals primarily with undergraduate programs, so if you're interested in applying to medical school I'd recommend that you start by looking into the AMA, the American Medical Association. There is a unified application process to medical schools. They look for your grades in English, biology, inorganic and organic chemistry, and physics as well as your overall academic record. If you start with the AMA, you'll find plenty of helpful references and information.
You can get an idea of what med schools are looking for, however, by reading the introductory articles surrounding professional schools here on CollegeXpress.