The National Nurse Aide Assessment Program (NNAAP) is the largest nurse aide certification exam program in the U.S. with over 200,000 paper and practical exams administered annually.

The Medication Aide Certification Examination (MACE) is a national medication aide certification exam that will be administered to nurse aides who choose to receive additional training to become certified medication aides. 

NCSBN develops the content of the NNAAP and MACE exams and makes it available to a national test service. The national test service assumes responsibility for the scheduling, administration, and delivery of the exams through direct contracts with the states and territories that use the exams.