A collection of organizations providing health information arranged by topic. Also available in alphabetical order.
Immune System and Disorders
- American Academy of Allergy, Asthma, and Immunology
- Immune Deficiency Foundation
- Jeffrey Modell Foundation
- National Institute of Allergy and Infectious Diseases
Impaired Driving
- Department of Transportation
- Governors Highway Safety Association
- National Highway Traffic Safety Administration
- National Institute on Alcohol Abuse and Alcoholism
- National Institute on Drug Abuse
Impetigo
- American Academy of Dermatology
- National Institute of Allergy and Infectious Diseases
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Indigestion
- American College of Gastroenterology
- American Gastroenterological Association
- National Institute of Diabetes and Digestive and Kidney Diseases
Indoor Air Pollution
- American Lung Association
- Centers for Disease Control and Prevention
- Consumer Product Safety Commission
- National Institute of Environmental Health Sciences
- Toxicology Education Foundation
Infant and Newborn Care
- American Academy of Pediatrics
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- KidsHealth (Nemours Foundation)
- Zero to Three
Infant and Newborn Development
- American Academy of Pediatrics
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- FPG Child Development Institute
- KidsHealth (Nemours Foundation)
- National Association for the Education of Young Children
- Zero to Three
Infant and Newborn Nutrition
- Academy of Nutrition and Dietetics
- American Academy of Pediatrics
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- Food and Nutrition Information Center
- Food and Nutrition Service
- KidsHealth (Nemours Foundation)
Infection Control
- Association for Professionals in Infection Control and Epidemiology
- Centers for Disease Control and Prevention
- Infectious Diseases Society of America
- National Institute of Allergy and Infectious Diseases
- World Health Organization
Infections and Pregnancy
- March of Dimes Birth Defects Foundation
- MotherToBaby (Organization of Teratology Information Specialists)
- National Institute of Allergy and Infectious Diseases
Infectious Arthritis
- American College of Rheumatology
- Arthritis Foundation
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Infectious Diseases
- Centers for Disease Control and Prevention
- National Foundation for Infectious Diseases
- National Institute of Allergy and Infectious Diseases
Infectious Mononucleosis
Infertility
- American Society for Reproductive Medicine
- Department of Health and Human Services, Office on Women's Health
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- Oncofertility Consortium
- Society for Assisted Reproductive Technology
- Society for Reproductive Endocrinology and Infertility
- Society of Reproductive Surgeons
Inhalants
- Drug Enforcement Administration
- National Institute on Drug Abuse
- Partnership to End Addiction
- Substance Abuse and Mental Health Services Administration
Inhalation Injuries
Insect Bites and Stings
Insomnia
International Health
- FHI 360
- Fogarty International Center
- International Federation of Red Cross and Red Crescent Societies
- Pan American Health Organization
- UNICEF
- United States Agency for International Development
- World Health Organization
Interstitial Cystitis
Interstitial Lung Diseases
Intestinal Cancer
Iron
- Food and Drug Administration
- Food and Nutrition Information Center
- National Institutes of Health, Office of Dietary Supplements
Irritable Bowel Syndrome
- American Gastroenterological Association
- National Institute of Diabetes and Digestive and Kidney Diseases