Medical Organizations
- American Dental Hygienists' Association (ADHA)
- American Dental Trade Association (ADTA)
- American Dermatological Association (ADA)
- American Diabetes Association (ADA)
- American Dietetic Association (ADA)
- American Electroencephalographic Society (AES)
- American Epidemiological Society (AES)
- American Epilepsy Society (AES)
- American Family Therapy Academy (AFTA)
- American Federation for Clinical Research (AFCR)
- American Fertility Society (AFS)
- American Fitness Professionals & Associates (AFPA)
- American Foundation for AIDS Research (amfAR)
- American Functional Medicine Association (AFMA)
- American Gastroenterological Association (AGA)
- American Gastroenterology Association (AGA)
- American Gastroscopic Association (AGA)
- American Genetic Association (AGA)
- American Geriatrics Association (AGA)
- American Geriatrics Society (AGS)
- American Glaucoma Society (AGS)
- American Group Psychotherapy Association (AGPA)
- American Gynecologic Society (AGS)
- American Headache Society (AHS)
- American Health Foundation (AHF)
- American Health Information Management Association (AHIMA)
- American Heart Association (AHA)
- American Herbalists Guild (AHG)
- American Hernia Society (AHS)
- American Holistic Health Association (AHHA)
- American Holistic Nurses Association (AHNA)
- American Holistic Nurses Credentialing Corporation (AHNCC)
- American Hospital Association (AHA)
- American Hospital Formulary Service (AHFS)
- American Hypnosis Association (AHA)
- American Industrial Health Conference (AIHC)
- American Industrial Hygiene Association (AIHA)
- American Institute of Biological Sciences (AIBS)
- American Institute of Homeopathy (AIH)
- American Institute of Hypnosis (AIH)
- American Institute of Minimally Invasive Surgery (AIMIS)
- American Institute of Nutrition (AIN)
- American Institute of Psychoanalysis (AIP)
- American Institute of the History of Pharmacy (AIHP)
- American Institute of Ultrasound in Medicine (AIUM)
- American Interventional Headache Society (AIHS)
- American Laryngological Association (ALA)
- American Laryngological, Rhinological, and Otological Society (ALROS)
- American Laser Study Club (ALSC)
- American Liver Foundation (ALF)
- American Lung Association (ALA)
- American Massage Therapy Association (AMTA)
- American Medical Association (AMA)
- American Medical Group Association (AMGA)
- American Medical Informatics Association (AMIA)
- American Medical Joggers Association (AMJA)
- American Medical Marijuana Association (AMMA)
- American Medical Society for Sports Medicine (AMSSM)
- American Medical Student Association (AMSA)
- American Medical Technologists (AMT)
- American Medical Women's Association (AMWA)
- American Med Spa Association (AMSPA)
- American Mental Health Counselors Association (AMHCA)
- American Microscopical Society (AMS)
- American Microsurgical Orthoplastic Society (AMOS)
- American Music Therapy Association (AMTA)
- American Muslim Health Professionals (AMHP)
- American National Standards Institute (ANSI)
- American Natural Hygiene Society (ANHS)
- American Naturopathic Medical Certification Board (ANMCB)
- American Nephrology Nurses Association (ANNA)
- American Neurological Association (ANA)
- American Neurotology Society (ANS)
- American Nurses Association (ANA)
- American Nurses Credentialing Center (ANCC)
- American Nurses Foundation (ANF)
- American Nutrition Association (ANA)
- American Occupational Therapy Association (AOTA)
- American Occupational Therapy Foundation (AOTF)
- American Ophthalmological Society (AOS)
- American Optometric Association (AOA)
- American Organization for Bodywork Therapies of Asia (AOBTA)
- American Orthodontic Society (AOS)
- American Orthopaedic Society for Sports Medicine (AOSSM)
- American Orthopedic Association (AOA)
- American Orthopsychiatric Association (Ortho)
- American Orthotic and Prosthetic Association (AOPA)
- American Orthotic & Prosthetic Association (AOPA)
- American Osteopathic Academy of Orthopedics (AOAO)
- American Osteopathic Academy of Sports Medicine (AOASM)
- American Osteopathic Association (AOA)
- American Osteopathic Board of Emergency Medicine (AOBEM)
- American Osteopathic Board of Internal Medicine (ABoIM)
- American Osteopathic College of Anesthesiologists (AOCA)
- American Osteopathic College of Dermatology (AOCD)
- American Osteopathic College of Pathologists (AOCPA)
- American Osteopathic College of Physical Medicine and Rehabilitation (AOCPMR)
- American Osteopathic College of Proctology (AOCPr)
- American Osteopathic College of Radiology (AOCR)
- American Otological Society (AOS)