Registries of certified nurse’s aides are maintained by state boards of nursing, departments of health or departments of human services, notes the North Carolina Division of Health Service Regulation. Each state plus the District of Columbia has its own registry.
Nurse’s aides are certified by the state in which they work, according to the Bureau of Labor Statistics. These aides must complete a state-sanctioned program and pass an exam to become certified and be placed on the state registry, and there may be additional requirements. The North Carolina Division of Health Service Regulation provides the contact information for each agency that maintains a nurse's aide registry, including links to those with websites.