Chiropractic is a regulated healthcare profession in the United States and has been for more than 100 years. Before being granted a license to practice, doctors of chiropractic (DCs) must meet stringent educational and competency standards set forth by the National Board of Chiropractic Examiners and individual states. Kansas was the first state to license chiropractic in 1913. Today, all 50 U.S. states, the District of Columbia, all U.S. territories, and more than 40 countries worldwide license chiropractors.