Associations Home>Nursing>Specialties>Community_Health>Associations     Web Pages American Academy of Ambulatory Care Nursing National organization of professional nurses working within an ambulatory setting. Membership application, certification and conference information. American Public Health Association Founded in 1872, the APHA represents more than 50,000 members from over 50 occupations of public health. National Rural Health Association Seeks to improve the health of rural Americans, and to provide leadership on rural health issues. News, publications, membership and conference information.