How many years of school does it take to become a dermatologist?

I want a master's degree in it. Not including a 4 year college, how long would I be in Med school?? What are some good med schools?How many years of school does it take to become a dermatologist?
Sorry, you can't get a masters in dermatology - a dermatology is a specialized doctor. That's 4 years of college, 4 years of medical school, and 5 years of residency (training). Top med schools include Johns Hopkins, Harvard, UPenn, Stanford, and U Washington St. Louis, along with 126 other schools. You don't need to do your undergrad somewhere to go to med school there, and you don't need to look for a program specializing in dermatology until your residency.