If you are interested in becoming a medical assistant, you will need to go through a certification program. This is usually two to three years in length (more if you work full time). After that, or toward the end of your coursework, you will also be required to complete an internship, which is a good way to get your foot in the door of a company for your first job. In general Medical Assistant go to school for two years to get an associates degree. Some certification programs take less time.