Healthfinder
Healthfinder is an award-winning Federal Web site, developed by the U.S. Department of Health and Human Services together with other Federal agencies. Since 1997, Healthfinder has been recognized as a key resource for finding the best government and nonprofit health and human services information on the Internet. Healthfinder links to carefully selected information and Web sites from over 1800 health-related organizations

Medpedia
Similar to wikipedia but changes and additions are edited by professionals with MDs or PhDs in a biomedical science.

Top Health Information Sites
Follow these links to highly recommended medical web pages.

These libraries have especially good health web pages:
Kansas City Public Library
Stanford Health Library