- The American Naturopathic Medical Association is the nation's oldest and largest American Association of Naturopathic Physicians. Founded in 1981, ANMA is a nonprofit, scientific, educational, organization, dedicated to exploring new frontiers of mind, body, medicine and health. ANMA has a nondiscriminatory policy, with membership open to individuals with Doctor of Naturopathy (N.D.) or Doctor ...www.anma.com