The American Medical Association (AMA) is a non-profit professional association founded in 1847 and incorporated in 1897 and headquartered in Chicago, Illinois. The AMA represents physicians and medical students in the United States. The mission of the AMA is “to advance the art and science of medicine and to improve the health of the population.” The AMA is made up of various groups: Membership, Publishing and Business Services, Core Operations, Administration and Operations, and Affiliates. The AMA publishes the Journal of the American Medical Association (JAMA), which has the largest circulation of any weekly medical journal in the world. The AMA publishes a list of Physician Specialty Codes, which are the standard method for identifying the specialties of physicians and medical practitioners in the United States.