The American Medical Association (AMA), founded in 1847 and headquartered in Chicago, is the largest national association representing physicians and medical students across the United States. Its mission is to promote the art and science of medicine and the betterment of public health. The AMA advances this goal through policy advocacy, physician education, research, and public health initiatives. It publishes the Journal of the American Medical Association (JAMA) and several specialty journals, maintains standards in medical ethics, oversees the CPT coding system, manages the Physician Professional Data Masterfile, and provides resources such as continuing medical education, residency match tools, and advocacy on health policy matters.