You hold a current Certified Medical Assistant (CMA) credential (AAMA, AECA, AMCA, AMT, NAHP, NCCT, NCMA, or NHA) and a current American Heart Association BLS certification, and a High School Diploma or GED equivalent. A typical day for a Certified Medical Assistant may include: Preparing patients for examinations by obtaining vital signs, documenting medical histories, and ensuring they feel comfortable and informed throughout their visit.