Medical Organizations
- American Society of Neurophysiological Monitoring (ASNM)
- American Society of Neuroradiology (ASN)
- American Society of Nuclear Cardiology (ASNC)
- American Society of Ophthalmic Plastic and Reconstructive Surgery (ASOPRS)
- American Society of Ophthalmologic and Otolaryngologic Allergy (ASOOA)
- American Society of Orthodontists (ASO)
- American Society of Pain & Neuroscience (ASPN)
- American Society of Parasitologists (ASP)
- American Society of Pharmacognosy (ASP)
- American Society of Phlebotomy Technicians (ASPT)
- American Society of Plastic Surgeons (ASPS)
- American Society of Podiatric Surgeons (ASPS)
- American Society of Preventive Cardiology (ASPC)
- American Society of Preventive Oncology (ASPO)
- American Society of Radiologic Technologists (ASRT)
- American Society of Regional Anesthesia and Pain Medicine (ASRA)
- American Society of Registered Nurses (ASRN)
- American Society of Transplantation (AST)
- American Society of Transplant Surgeons (ASTS)
- American Society of Tropical Medicine and Hygiene (ASTMH)
- American Sociological Society (ASS)
- American Speech-Language and Hearing Association (ASHA)
- American Speech-Language-Hearing Association (ASLHA)
- American Sports and Fitness Association (ASFA)
- American Sports Medicine Institute (ASMI)
- American Stroke Association (ASA)
- American Student Dental Association (ASDA)
- American Substance Abuse Professionals (ASAP)
- American Surgical Association (ASA)
- American Telemedicine Association (ATA)
- American Temperance Society (ATS)
- American Therapeutic Recreation Association (ATRA)
- American Therapeutic Society (ATS)
- American Thoracic Society (ATS)
- American Thyroid Association (ATA)
- American Tinnitus Association (ATA)
- American Trauma Society (ATS)
- American Travel Health Nurses Association (ATHNA)
- American Urogynecologic Society (AUGS)
- American Urological Association (AUA)
- American Vein & Lymphatic Society / American College of Phlebology (AVLS / ACP)
- American Venereal Disease Association (AVDA)
- American Venous Forum (AVF)
- American Veterinary Medical Association (AVMA)
- American Women's Hospitals Service (AWHS)
- Anatomical Society of Great Britain and Ireland (ASGB)
- Anatomical Society (UK) (BAS)
- Animal Diseases Research Institute (Canada) (ADRI)
- Anthroposophic Health Association (AHA)
- Apostolic Healthcare International (AHI)
- Applied Metapsychology International (AMI)
- APTA Michigan, A Chapter of the American Physical Therapy Association (APTA MI)
- Aquatic Therapy and Rehab Institute (ATRI)
- Arizona Association of Chiropractic (AAC)
- Arizona Coalition to End Sexual & Domestic Violence (ACESDV)
- Arizona Dental Association (ADA)
- Arizona Medical Association (ArMA)
- Arizona Occupational Therapy Association (ArizOTA)
- Arizona Psychological Association (AzPA)
- Arizona State Association of Physician Assistants (ASAPA)
- Arizona Urological Society (AUS)
- Arkansas Association of Alcoholism & Drug Abuse Counselors (AAADAC)
- Arkansas Medical Society (AMS)
- Armed Forces Institute of Pathology (AFIP)
- Army Medical Specialist Corps (AMSC)
- Army Nurses Corps (ANC)
- ARNPs United of Washington State (AUWS)
- Arthritis Foundation (AF)
- Arthroscopy Association of North America (AANA)
- Asian Pacific American Medical Student Association (APAMSA)
- Asociación de Psicología de Puerto Rico (APPR)
- Asociacion Farmaceutica y Biochimica Argentina; Argentinian Pharmaceutical and Biochemical Association (AFBA)
- Assistive Technology Industry Association (ATIA)
- Associated Bodywork & Massage Professionals (ABMP)
- Association Européenne de Radiologie; European Association of Radiology (AER)
- Association Européenne des Spécialités Pharmaceutiques Grand Public (Paris) (AESGP)
- Association for Academic Surgery (AAS)
- Association for Addiction Professionals, National Association for Alcoholism and Drug Abuse Counselors (NAADAC)
- Association for Behavioral and Cognitive Therapies (ABCT)
- Association for Behavior Analysis International (ABAI)
- Association for Clinical Pastoral Education (ACPE)
- Association for Contextual Behavioral Science (ACBS)
- Association for Counselor Education and Supervision (ACES)
- Association for Healthcare Administrative Professionals (AHAP)
- Association for Humanistic Counseling (AHC)
- Association for Multicultural Counseling and Development (AMCD)
- Association for NLP (ANLP)
- Association for Physical and Mental Rehabilitation (APMR)
- Association for Play Therapy (APT)
- Association for Psychological Science (APS)
- Association for Research in Nervous & Mental Disease (ARNMD)
- Association for Research in Vision and Ophthalmology (ARVO)
- Association for Respiratory Technology and Physiology (UK) (ARTP)
- Association for Size Diversity and Health (ASDAH)
- Association for the Advancement of Medical Instrumentation (AAMI)
- Association for the Advancement of Restorative Medicine (AARM)
- Association for the Advancement of Wound Care (AAWC)
- Association for the Behavioral Sciences and Medical Education (ABSME)
- Association for the Psychophysiological Study of Sleep (APPS)
- Association for the Study of Internal Secretions (ASIS)