Medical Organizations
- American Pain Society (APS)
- American Patient Rights Association (APRA)
- American Pediatric Society (APS)
- American Pediatric Surgical Association (APSA)
- American Pharmacists Association (APA)
- American Physical Therapy Association (APTA)
- American Physical Therapy Association of Georgia (APTA GA)
- American Physical Therapy Association of Washington (APTA WA)
- American Physician Scientists Association (APSA)
- American Physiological Society (APS)
- American Podiatric Medical Association (APMA)
- American Proctologic Society (APS)
- American Professional Society of ADHD and Related Disorders (APSARD)
- American Professional Wound Care Association (APWCA)
- American Prosthodontic Society (APS)
- American Protestant Hospital Association (APHA)
- American Psychiatric Association (APA)
- American Psychiatric Nurses Association (APNA)
- American Psychoanalytic Association (APA)
- American Psychological Association (APA)
- American Psychological Society (APS)
- American Psychology-Law Society (AP-LS)
- American Psychopathological Association (APPA)
- American Psychosomatic Society (APS)
- American Psychotherapy Association (APA)
- American Public Health Association (APHA)
- American Radiological Nurses Association (ARNA)
- American Radium Society (ARS)
- American Recovery and Reinvestment Act (ARRA)
- American Red Cross (ARC)
- American Reflexology Certification Board (ARCB)
- American Registry for Diagnostic Medical Sonography (ARDMS)
- American Registry of Medical Assistants (ARMA)
- American Registry of Pathology (ARP)
- American Registry of Physical Therapists (ARPT)
- American Registry of Radiologic Technologists (ARRT)
- American Rhinologic Society (ARS)
- American Roentgen Ray Society (ARRS)
- American School Counselor Association (ASCA)
- American School Health Association (ASHA)
- American Society for Aesthetic Plastic Surgery (ASAPS)
- American Society for Apheresis (ASFA)
- American Society for Artificial Internal Organs (ASAIO)
- American Society for Biochemistry and Molecular Biology (ASBMB)
- American Society for Clinical Laboratory Science (ASCLS)
- American Society for Clinical Oncology (ASCO)
- American Society for Clinical Pathology (ASCP)
- American Society for Colposcopy and Cervical Pathology (ASCCP)
- American Society for Cytotechnology (ASC)
- American Society for Dermatologic Surgery (ASDS)
- American Society for Experimental Pathology (ASEP)
- American Society for Gastrointestinal Endoscopy (ASGE)
- American Society for Head and Neck Surgery (ASHNS)
- American Society for Health Care Risk Management (ASHRM)
- American Society for Histocompatibility and Immunogenetics (ASHI)
- American Society for Investigative Pathology (ASIP)
- American Society for Laser Medicine and Surgery (ASLMS)
- American Society for Medical Technology (ASMT)
- American Society for Metabolic & Bariatric Surgery (ASMBS)
- American Society for Microbiology (ASM)
- American Society for MOHS Surgery (ASMS)
- American Society for Parenteral and Enteral Nutrition (ASPEN)
- American Society for Pharmacology and Experimental Therapeutics (ASPET)
- American Society for Psychoprophylaxis in Obstetrics (ASPO)
- American Society for Radiation Oncology (ASRO)
- American Society for Reproductive Medicine (ASRM)
- American Society for Surgery of the Hand (ASSH)
- American Society for Testing and Materials (ASTM)
- American Society for the Control of Cancer (ASCC)
- American Society for the Prevention of Cruelty to Animals (ASPCA)
- American Society for Therapeutic Radiology and Oncology (ASTRO)
- American Society for the Study of Arteriosclerosis (ASSA)
- American Society for the Study of Sterility (ASSS)
- American Society for Virology (ASV)
- American Society of Acupuncturists (ASA)
- American Society of Addiction Medicine (ASAM)
- American Society of Andrology (ASA)
- American Society of Anesthesiologists (ASA)
- American Society of Biological Chemists (ASBC)
- American Society of Cataract and Refractive Surgery (ASCRS)
- American Society of Clinical Hypnosis (ASCH)
- American Society of Colon and Rectal Surgeons (ASCRS)
- American Society of Consultant Pharmacists (ASCP)
- American Society of Cosmetic Physicians (ASCP)
- American Society of Dental Radiographers (ASDR)
- American Society of Dentist Anesthesiologists (ASDA)
- American Society of Dentistry for Children (ASDC)
- American Society of Echocardiography (ASE)
- American Society of Hand Therapists (ASHT)
- American Society of Health-System Pharmacists (ASHSP)
- American Society of Hematology (ASH)
- American Society of Human Genetics (ASHG)
- American Society of Hypertension (ASH)
- American Society of Internal Medicine (ASIM)
- American Society of Interventional Pain Physicians (ASIPP)
- American Society of Law, Medicine and Ethics (ASLME)
- American Society of Liposuction Surgery (ASLS)
- American Society of Maxillofacial Surgeons (ASMS)
- American Society of Medication Safety Officers (ASMSO)
- American Society of Nephrology (ASN)