The National Association of Health Data Organizations (NAHDO) is a national, not-for-profit membership organization dedicated to improving health care through the collection, analysis, dissemination, public availability, and use of health data.

NAHDO provides leadership in health care information management and analysis, promotes the availability of and access to health data, and encourages the use of these data to make informed decisions and guide the development of health policy. NAHDO provides information on current issues and strategies to develop a nationwide, comprehensive, integrated health information system, sponsors educational programs, provides assistance, and serves as a forum to foster collaboration and the exchange of ideas and experiences among collectors and users of health data. By doing so, NAHDO works to increase the state of knowledge.