| MedlinePlus | Extensive information on diseases and drugs, with links to doctors and hospitals |
| Healthline | Comprehensive search index to the top health sites on the Web |
| MayoClinic.com | Diseases and conditions, drugs, and healthy living information |
| Healthfinder | A wide range of information from the National Health Information Center |
| OmniMedicalSearch.com | Search multiple medical search engines all at once on this site |
| HealthWeb | Provides links to evaluated, non-commercial health websites |
| eMedicine | For physicians and other healthcare professionals. Comprehensive coverage of over 7,000 diseases and disorders. Free registration required. |
| Hardin MD | University of Iowa health website notable for its many links to medical pictures |
| National Center for Complementary and Alternative Medicine | From the National Institutes of Health |
| AARP Health Guide | Information on health, drugs, and tests, especially for those over the age of 50 |
| National Women's Health Information Center | From the U.S. Department of Health and Human Services |
| KidsHealth | Health information for parents, teens, and kids |
| National Mental Health Information Center | Provides numerous links to organizational and governmental websites |
| MedlinePlus Drugs & Supplements | Covers prescription and over-the-counter drugs plus supplements and herbs |
| Food & Nutrition Information Center | USDA information on dietary supplements, food composition, and hundreds of other nutrition-related topics |
| ClinicalTrials.gov | National Institutes of Health site can be searched by disease, treatment, location, and sponsor |
| National Cancer Institute | Cancer types, treatment, statistics, clinical trials |
