The Certified Medical Assistant (CMA) and Registered Medical Assistant (RMA) credentials are voluntary, though many medical assistants find that individual employers require them prior to making an offer of employment. To get certifed or registered, a candidate may have to take an exam adiministered by either the Certifying Board of the American Association of Medical Assistants or the American Medical Technologists. To learn more about qulaifying to be a medical assistant and exam details, see our Medical Assistant Test Guide.