Medical Organizations
- International Association for Analytical Psychology (IAAP)
- International Association for Maternal and Neonatal Health (IAMANEH)
- International Association for Medical Assistance to Travelers (Canada) (IAMAT)
- International Association for Physicians in Aesthetic Medicine (IAPAM)
- International Association for Preventative Pediatrics (IAPP)
- International Association for Prevention of Blindness (IAPB)
- International Association for Suicide Prevention (IASP)
- International Association for the Study of Pain (IASP)
- International Association for the Study of the Liver (IASL)
- International Association of Applied Psychology (IAAP)
- International Association of Biological Standardization (IABS)
- International Association of Dental Students (IADS)
- International Association of Eating Disorder Professionals (iaedp)
- International Association of Forensic Nurses (IAFN)
- International Association of Forensic Sciences (IAFS)
- International Association of Genito-Urinary Surgeons (IAGUS)
- International Association of Geographic Pathology (IAGP)
- International Association of Gerontology and Geriatrics (IAGG)
- International Association of Healthcare Practitioners (IAHP)
- International Association of Health Coaches (IAHC)
- International Association of Leprosy Charity Organizations (ILEP)
- International Association of Logopedics and Phoniatrics (IALP)
- International Association of Medical Colleges (IAMC)
- International Association of Medical Laboratory Technologists (IAMLT)
- International Association of Medical Museums (IAMM)
- International Association of Mercury Safe Dentists (IAMSD)
- International Association of Microbiological Societies (IAMS)
- International Association of Microbiologists (IAMB)
- International Association of Orofacial Myology (IAOM)
- International Association of Orthodontics (IAO)
- International Association of Parkinsonism and Related Disorders (IAPRD)
- International Association of Psychotechnics (IAP)
- International Association of Rehabilitation Professionals (IARP)
- International Association of Trauma Professionals (IATP)
- International Atomic Energy Agency (IAEA)
- International Atomic Energy Organization (IAEO)
- International Biological Program (IBP)
- International Board of Lactation Consultant Examiners (IBLCE)
- International Board of Medicine and Surgery (IBMS)
- International Brain Research Organization (France) (IBRO)
- International Cardiac Doppler Society (ICDS)
- International Cell Research Organization (France) (ICRO)
- International Center of Social Gerontology (ICSG)
- International Centre for Excellence in Emotionally Focused Therapy (ICEEFT)
- International Cesarean Awareness Network (ICAN)
- International Childbirth Education Association (ICEA)
- International Chiropractic Pediatric Association (ICPA)
- International Chiropractors Association (ICA)
- International Clinical Cytometry Society (ICCS)
- International Coaching Federation (ICF)
- International Code Council (ICC)
- International Code of Nomenclature of Bacteria and Viruses (ICNBV)
- International College of Applied Kinesiology (ICAK)
- International College of Dentists (ICD)
- International College of Medical Practice (ICMP)
- International College of Surgeons (ICS)
- International Commission for Optics (ICO)
- International Commission for the Prevention of Alcoholism (ICPA)
- International Commission for Uniform Methods of Sugar Analysis (ICUMSA)
- International Commission on Radiation Protection (ICRP)
- International Commission on Radiological Education (ICRE)
- International Commission on Radiological Protection (IRCP)
- International Commission on Radiological Units (ICRU)
- International Commission on Radium Standards (ICRS)
- International Commission on Zoological Nomenclature (ICZN)
- International Committee for Contraceptive Research (ICCR)
- International Committee for Natural Therapeutics (ICNT)
- International Committee for Social Sciences Information (ICSSD)
- International Committee for Standardization in Hematology (ICSH)
- International Committee for Standardization in Human Biology (ICSHB)
- International Committee of Military Medicine and Pharmacy (ICMMP)
- International Committee of the Red Cross (ICRC)
- International Committee on Bacteriological Nomenclature (ICBN)
- International Committee on Hemostasis and Thrombosis (ICHT)
- International Committee on Laboratory Animals (ICLA)
- International Committee on Planned Parenthood (ICPP)
- International Confederation for Plastic Surgery (IPS)
- International Confederation of Midwives (ICM)
- International Conference on Antioxidants and Degenerative Diseases (ICADD)
- International Conference on Population and Development (ICPD)
- International Conference on Society and Information Technologies (ICSIT)
- International Conference on the Biochemistry of Lipids (ICBL)
- International Congress of Genetics (ICG)
- International Congress of Oral Implantologists (ICOI)
- International Congress of Otolaryngology (ICO)
- International Congress of Parasitology (ICOPA)
- International Congress of Radiology (ICR)
- International Congress on Encephalography and Clinical Neurology (ICECN)
- International Congress on Social Welfare (ICSW)
- International Congress on Tropical Medicine and Malaria (ICTMM)
- International Contact Dermatitis Research Group (ICDRG)
- International Continence Society (ICS)
- International Convention of Psychological Science (ICPS)
- International Council for Building Research Studies and Documentation (GIB)
- International Council of Certified Dementia Practitioners (ICCDP)
- International Council of Nurses (ICN)
- International Council of Scientific Unions (ICSU)
- International Council of Sports and Physical Education (ICSSPE)
- International Council on Active Aging (ICAA)
- International Council on Alcohol and Addiction (ICAA)