A collection of organizations providing health information arranged by topic. Also available in alphabetical order.
Rabies
Radiation Emergencies
Radiation Exposure
- Centers for Disease Control and Prevention
- Health Physics Society
- National Institute of Environmental Health Sciences
- U.S. Nuclear Regulatory Commission
Radiation Therapy
- American Cancer Society
- American Society for Radiation Oncology
- National Cancer Institute
- Society of NeuroInterventional Surgery
Radon
Rare Diseases
- Food and Drug Administration
- Genetic and Rare Diseases Information Center
- National Center for Advancing Translational Sciences
- National Organization for Rare Disorders
- Rare Diseases Clinical Research Network
Rashes
- American Academy of Dermatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Raynaud's Disease
- American Society for Surgery of the Hand
- National Heart, Lung, and Blood Institute
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Rectal Disorders
- American College of Gastroenterology
- American Society of Colon and Rectal Surgeons
- National Institute of Diabetes and Digestive and Kidney Diseases
Refractive Errors
- American Academy of Ophthalmology
- American Optometric Association
- National Eye Institute
- Prevent Blindness America
Rehabilitation
- American Academy of Physical Medicine and Rehabilitation
- American Art Therapy Association
- American Dance Therapy Association
- American Massage Therapy Association
- American Occupational Therapy Association
- American Physical Therapy Association
- American Therapeutic Recreation Association
- Association of Academic Physiatrists
- Kessler Foundation Research Center (Kessler Medical Rehabilitation Research and Education Corporation)
- National Center on Health, Physical Activity and Disability
- Rehabilitation Services Administration
Reproductive Hazards
- American Society for Reproductive Medicine
- MotherToBaby (Organization of Teratology Information Specialists)
- Society for Reproductive Endocrinology and Infertility
Respiratory Failure
Respiratory Syncytial Virus Infections
Restless Legs
- National Heart, Lung, and Blood Institute
- National Institute of Neurological Disorders and Stroke
- Restless Legs Syndrome Foundation
Retinal Detachment
- American Academy of Ophthalmology
- American Society of Retina Specialists
- Foundation Fighting Blindness
- National Eye Institute
- Prevent Blindness America
Retinal Disorders
- American Academy of Ophthalmology
- American Society of Retina Specialists
- Foundation Fighting Blindness
- National Eye Institute
- Prevent Blindness America
Rett Syndrome
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- International Rett Syndrome Foundation
- National Institute of Neurological Disorders and Stroke
Reye Syndrome
Rh Incompatibility
Rheumatoid Arthritis
- American College of Rheumatology
- Arthritis Foundation
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Rickets
Rosacea
- American Academy of Dermatology
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
- National Rosacea Society
Rotator Cuff Injuries
- American Academy of Orthopaedic Surgeons
- National Institute of Arthritis and Musculoskeletal and Skin Diseases
Rotavirus Infections
Rubella
- Centers for Disease Control and Prevention
- National Foundation for Infectious Diseases
- National Institute of Allergy and Infectious Diseases