Online Medical Assistant | Register with confidence because our online medical assistant program curriculum is nationally accredited and a student that successfully completed this program is eligible to sit for the national certification exams. Best American Healthcare University Clinical Medical Assistant program is nationally accredited. It is a 480 hour program. It is a 6 month program. At the end of the program study, the student will be eligible to sit for the national certification exams for: 1. Medical Administrative Assistants 2. Clinical Medical Assistants.