Not every state requires medical assistants to be certified, but most do, and many of the jobs required of most medical assistants are regulated and require state certification.
So, your best bet is to get into a good school. There are currently over 140 medical assistant training programs offered by nationally accredited schools. You won’t have any problem finding a program that fits your needs and goals. To know more about the Certified Medical Assistant School, you can browse the web.
Contact your local hospital about training in their home. Often you can find a program that really pays for your work while you're training. Typically, the hospital or clinic will pay for your training in exchange for a contract of employment, the duration of which will depend on the amount of training you receive.
Two-year training could "cost" of your employment contract two or three years. So, they pay for your training, you employ when you train and they pretty much guarantees you a job for two or three years into the future. Where else can you find that?
Almost everyone can get into medical assistant training program, but if you want a job choice or opportunity to get paid while in training, then you should have a better than average value of the average in high school and / or junior college.
It also helps to score well on the exam notes you graduate, medical college admissions test or has some sort of logged hours of patient care. These are all things that can seriously improve your chances of getting the best training and as a result, the best opportunities for employment.