This list of study topics is modified only slightly from this super textbook. Tap this image to learn more about perhaps picking up a copy of your own. (Ps-s-s-t. The less expensive used copies and earlier editions will work well for you if you aren't in school at the moment).
You can download a free PDF version of the first chapter, The Profession of Medical Assisting
Study Topics for Medical Assistants
These are the most relevant topics of study for prospective medical assistants. The list is imposing--maybe even scary and discouraging--but you will most likely have a full year to do all of this and, of course, you will have the assistance and encouragement of some terrific teachers.
Small steps ... small steps