There is a wide range of mandatory and optional professional certifications available to health care professionals in the United States. Certifications such as the U.S. Medical Licensing Examination are mandatory for all physicians who wish to practice in the United States, according to USMLE.
Nurses require a license after being certified by a state board for nursing that is recognized by the National Council of State Boards of Nursing and must pass a licensing examination. They may also acquire special certifications as nursing professionals in specialized fields such as acute care, cardiac care or psychiatric care from the American Nurses Credentialing Center. Nurses who have studied abroad need to be certified by the Commission on Graduates of Foreign Nursing Schools before being allowed to enter the U.S. health care system as certified nurses, according to the U.S. Citizenship and Immigration Services.
Occupational therapists and other health care professionals such as emergency medical technicians require professional certifications from organizations such as the National Board for Certification in Occupational Therapy and specialized emergency care certifications from the National Association of Emergency Medical Technicians, according to the USCIS and the NAEMT. However, accreditation by the Continuing Education Coordinating Board for Emergency Medical Services is the primary board certification for an EMT.