American Academy of Anti-Aging Medicine (A4M), 800-558-1267

www.worldhealth.net (Group of physicians, health practitioners, scientists & others; includes “Physician Finder”)

American Academy of Environmental Medicine (AAEM), 316-684-5500

www.aaemonline.org (Physicians and others serving the public through education about the interaction between humans and their environment; includes “Find a Physician”)

American Association of Integrative Medicine (AAIM), 417-881-9995

www.aaimedicine.com (Integrative physicians and licensed practitioners promoting the integrity, recognition and legal status of integrative medicine; includes “National Referral Service”)

American Association of Naturopathic Physicians (AANP), 202-237-8150

www.naturopathic.org (Advancing the profession of naturopathic medicine; includes “Find a Naturopathic Doctor”)

American College for Advancement in Medicine (ACAM), 888-439-6891

www.acam.org (Educating physicians and others on complementary, alternative and integrative medicine; includes “Find a Physician”)

American Holistic Health Association (AHHA), 714-779-6152

www.ahha.org (Online resource for the public regarding holistic practitioners and healing centers; includes “Referrals”)

American Holistic Medical Association (AHMA), 216-292-6644

www.holisticmedicine.org (Physicians, practitioners and others promoting the transformation of healthcare to a more holistic model; includes “Doctor Finder” and “Practitioner Finder”)

American Holistic Nurses Association (AHNA), 800-278-2462

www.ahna.org (Holistic nurses)

American Institute of Homeopathy (AIH), 888-445-9988

www.homeopathyusa.org (Trade association of physicians, dentists, advanced practice nurses and physician assistants; includes “Find a Licensed Homeopathic Practitioner”)

Health World Online (HWO)

www.healthy.net (Comprehensive online resource for practitioners and conditions; includes “Find a Professional”)

The Holistic Option

www.holisticoption.com (Up-to-date info on complementary & alternative medicine, including practitioner listing)

International Academy of Oral Medicine and Toxicology (IAOMT), 863-420-6373

www.iaomt.org (Network of dental, medical and research professionals)

International College of Integrative Medicine (ICIM), 866-464-5226

www.icimed.com (Healthcare professionals in integrative and preventive medicine; includes “Find a Practitioner”)

Institute for Functional Medicine (IFM), 800-228-0622

www.functionalmedicine.org (Encouraging functional medicine as the standard of care; includes “Practitioner Search”)

National Association of Nutrition Professionals (NANP), 800-342-8037

www.nanp.org (Originally founded in 1985 as the Society of Certified Nutritionists, represents holistically-trained nutrition professionals ; includes "Member Directory")

Natural Standard

www.naturalstandard.com (Natural Standard was founded by clinicians and researchers to provide high quality, evidence-based information about complementary and alternative therapies. )

OHM Society - Orthomolecular Health Medicine - Society for Orthomolecular Medicine

www.ohmsociety.com (OHM was founded in 1994 to promote orthomolecular health-medicine, based on the medical use of nutrients, detoxification from pollutants, and physiological support of healing.

Physician's Association of Anthroposophic Medicine (PAAM)

www.paam.net  (Anthroposophic medicine is a holistic and human-centered approach to medicine; includes Directory of Physicians) 

The National Center for Homeopathy

www.homeopathic.org (A non-profit membership organization dedicated to promoting homeopathy in the United States through education, publication, research, and membership services)

Online resource by naturopathic medical students

www.medfinds.com