Like many psychology-related licensing, art therapy licenses vary by state, and having a license does not necessarily mean a therapist is nationally certified.

In 1895, Congress approved a measure to create a board of medicine, surgery and pharmacy, composed of all the doctors, surgeons and pharmacists that had been nationally certified.

The hospital is nationally certified in its joint and spine programs and has earned a national ranking for its surgical measures.

Illinois licenses only midwives who are registered nurses, have a master's degree, are nationally certified and collaborate with a physician.

To become a nationally certified résumé writer with the nonprofit National Résumé Writers Association, one must pass a committee review and exam.

Each member organization is certified nationally.

Professional members of the GDC are nationally certified with standards officers following the same measurement tools and criteria for reviewing applicants' case studies.

To become nationally certified, public health inspectors must complete a field training practicum, submit a number of reports and pass the Institute's exam.

Most nurse practitioners are nationally certified in their specialty area.

It is state-certified and has roughly 20 members who are state or nationally certified for emergency services.