A collection of organizations providing health information arranged by topic. Also available in alphabetical order.
Abdominal Pain
- American College of Gastroenterology
- National Institute of Diabetes and Digestive and Kidney Diseases
Abortion
Abscess
Acne
- American Academy of Dermatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Acoustic Neuroma
Acupuncture
- National Center for Complementary and Integrative Health
- National Certification Commission for Acupuncture and Oriental Medicine
Acute Bronchitis
Acute Lymphocytic Leukemia
- American Cancer Society
- Leukemia & Lymphoma Society
- National Cancer Institute
- National Marrow Donor Program
Acute Myeloid Leukemia
- American Cancer Society
- Leukemia & Lymphoma Society
- National Cancer Institute
- National Marrow Donor Program
Addison Disease
Adenoids
Adhesions
- National Institute of Diabetes and Digestive and Kidney Diseases
- Society of American Gastrointestinal and Endoscopic Surgeons
Adrenal Gland Cancer
Adrenal Gland Disorders
- CARES Foundation
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- Hormone Health Network
- National Institute of Diabetes and Digestive and Kidney Diseases
Advance Directives
Air Pollution
- American Lung Association
- Centers for Disease Control and Prevention
- National Institute of Environmental Health Sciences
Alcohol
- Al-Anon/Alateen (Al-Anon, Alateen)
- Alcoholics Anonymous
- National Institute on Alcohol Abuse and Alcoholism
Alcohol Use Disorder (AUD)
- Al-Anon/Alateen (Al-Anon, Alateen)
- Alcoholics Anonymous
- National Institute on Alcohol Abuse and Alcoholism
Alcohol Use Disorder (AUD) Treatment
Allergy
- American Academy of Allergy, Asthma, and Immunology
- American Academy of Otolaryngic Allergy
- American College of Allergy, Asthma & Immunology
- Asthma and Allergy Foundation of America
- National Institute of Allergy and Infectious Diseases
- National Institute of Environmental Health Sciences
Alpha-1 Antitrypsin Deficiency
Alzheimer's Caregivers
- Alzheimer's Association
- Family Caregiver Alliance
- Fisher Center for Alzheimer's Research Foundation
- National Institute on Aging
Alzheimer's Disease
- Alzheimer's Association
- Fisher Center for Alzheimer's Research Foundation
- National Institute of Neurological Disorders and Stroke
- National Institute on Aging
Amblyopia
American Indian and Alaska Native Health
- Association of American Indian Physicians
- Centers for Disease Control and Prevention
- Department of Health and Human Services, Office of Minority Health
- Indian Health Service
- National Institute on Minority Health and Health Disparities
Amino Acid Metabolism Disorders
Amyloidosis
Amyotrophic Lateral Sclerosis
- ALS Association
- Muscular Dystrophy Association
- National Institute of Neurological Disorders and Stroke
Anabolic Steroids
Anal Cancer
- American Cancer Society
- National Cancer Institute
- National Institute of Diabetes and Digestive and Kidney Diseases
Anal Disorders
- American College of Gastroenterology
- American Society of Colon and Rectal Surgeons
- National Institute of Diabetes and Digestive and Kidney Diseases
Anemia
- National Heart, Lung, and Blood Institute
- National Institute of Diabetes and Digestive and Kidney Diseases
Anesthesia
- American Association of Nurse Anesthetists
- American Society of Anesthesiologists
- Malignant Hyperthermia Association of the United States
- Society for Ambulatory Anesthesia
Aneurysms
Angina
Angioplasty
Animal Bites
Animal Diseases and Your Health
- American Veterinary Medical Association
- Centers for Disease Control and Prevention
- National Institute of Allergy and Infectious Diseases
Ankle Injuries and Disorders
- American Academy of Orthopaedic Surgeons
- American Orthopaedic Foot and Ankle Society
- Foot Health Facts (American College of Foot and Ankle Surgeons)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Ankylosing Spondylitis
- American College of Rheumatology
- Arthritis Foundation
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
- Spondylitis Association of America
Anthrax
Antibiotic Resistance
- Centers for Disease Control and Prevention
- Food and Drug Administration
- National Institute of Allergy and Infectious Diseases
Antibiotics
- Alliance for the Prudent Use of Antibiotics
- American Society of Health-System Pharmacists
- Centers for Disease Control and Prevention
- Food and Drug Administration
- National Institute of Allergy and Infectious Diseases
Antidepressants
Antioxidants
Anxiety
- American Academy of Child and Adolescent Psychiatry
- American Psychiatric Association
- Anxiety and Depression Association of America
- NAMI
- National Institute of Mental Health
Aortic Aneurysm
Aphasia
- National Aphasia Association
- National Institute of Neurological Disorders and Stroke
- National Institute on Deafness and Other Communication Disorders
Aplastic Anemia
- Aplastic Anemia & MDS International Foundation
- Fanconi Anemia Research Fund
- National Heart, Lung, and Blood Institute
- National Institute of Diabetes and Digestive and Kidney Diseases
Appendicitis
Arm Injuries and Disorders
- American Academy of Orthopaedic Surgeons
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Arrhythmia
- American Heart Association
- Heart Rhythm Society
- National Heart, Lung, and Blood Institute
- Sudden Arrhythmia Death Syndromes (SADS) Foundation
Arsenic
Arteriovenous Malformations
Arthritis
- American Academy of Orthopaedic Surgeons
- American College of Rheumatology
- Arthritis Foundation
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Artificial Limbs
- American Board for Certification in Orthotics and Prosthetics
- Amputee Coalition of America
- Department of Veterans Affairs
Asbestos
- Agency for Toxic Substances and Disease Registry
- American Lung Association
- Environmental Protection Agency
- National Cancer Institute
- National Institute for Occupational Safety and Health
- Occupational Safety and Health Administration
Asian American Health
- Asian & Pacific Islander American Health Forum
- Department of Health and Human Services, Office of Minority Health
- National Institute on Minority Health and Health Disparities
Aspergillosis
Assisted Living
Assistive Devices
- Food and Drug Administration
- Job Accommodation Network (Office of Disability Employment Policy)
- National Center on Health, Physical Activity and Disability
- National Institute on Deafness and Other Communication Disorders
- Rehabilitation Engineering and Assistive Technology Society of North America
- United States Access Board
Asthma
- American Academy of Allergy, Asthma, and Immunology
- American College of Allergy, Asthma & Immunology
- American Lung Association
- Asthma and Allergy Foundation of America
- National Heart, Lung, and Blood Institute
- National Institute of Allergy and Infectious Diseases
Asthma in Children
- American Academy of Allergy, Asthma, and Immunology
- American College of Allergy, Asthma & Immunology
- American Lung Association
- Asthma and Allergy Foundation of America
- National Heart, Lung, and Blood Institute
- National Institute of Allergy and Infectious Diseases
Ataxia Telangiectasia
- Ataxia-Telangiectasia Children's Project
- National Ataxia Foundation
- National Institute of Neurological Disorders and Stroke
Atherosclerosis
- American Heart Association
- National Heart, Lung, and Blood Institute
- Society of Interventional Radiology
Athlete's Foot
- American Academy of Dermatology
- American Podiatric Medical Association
- National Institute of Allergy and Infectious Diseases
Atrial Fibrillation
Attention Deficit Hyperactivity Disorder
- American Academy of Child and Adolescent Psychiatry
- Children and Adults with Attention-Deficit/Hyperactivity Disorder
- National Institute of Mental Health
Autism Spectrum Disorder
- Autism Society
- Autism Speaks
- Centers for Disease Control and Prevention
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- National Institute of Mental Health
- National Institute of Neurological Disorders and Stroke
- National Institute on Deafness and Other Communication Disorders
Autoimmune Diseases
- American Autoimmune Related Diseases Association
- American College of Rheumatology
- National Institute of Allergy and Infectious Diseases
- National Institute of Arthritis and Musculoskeletal and Skin Diseases