The AMA is the nation's leader in promoting professionalism in medicine and setting standards for medical education, practice, and ethics and the AMA web site contains pertinent medical information for physicians, medical students, other healthcare professionals, and patients.

C. Everett Koop, one of the most respected and revered names in health care, provides solid health information on a variety of topics with interactive features and up-to-date, easy-to-understand articles. A variety of reputable sources are quoted in the articles including medical experts, national agencies and alternative medicine sources.

This independent health care philanthropy group is focused on four main areas: health policy, reproductive health, HIV policy, and health and development in South Africa. The Foundation is a source of facts and analysis for policymakers, the media, the health care community, and the general public. It also maintains a special interest in health policy and innovation in the state of California, providing data on demographics, health, and health coverage including access, financing, state legislation, and more.

InteliHealth provides credible information from the most trusted sources, including Harvard Medical School and University of Pennsylvania School of Dental Medicine. Established in 1996, InteliHealth has become one of the leading online health information companies in the world, which includes health news and content as well as access to trackers, tools and risk assessments. It also provides access to InteliHealth Professional Network with access to the latest practice news.

Sponsored by the Stanford Medical Alumni Association, this web site provides students, patients, physicians and the health care community with some of the best medical sites on the Internet for patient resources, physician resources, and research through access to many medical journals.

Galaxy is a searchable, comprehensive, well-organized Internet directory providing indexes in many subject areas including Medicine. Trained in detailed and precise procedures, the Galaxy Internet Librarians, all of whom have MLS degrees with expertise in specific subject areas, apply a high standard of discretion when choosing sites to add to their database.

As the name "meta directory" implies, Hardin MD is a "list of lists," which provides access to a comprehensive directory of the best web sites in health and medicine on the Internet. Compiled by the Hardin Library for the Health Sciences, University of Iowa, they have included lists most frequently cited by people in the field.

This Health and Medicine search engine offers quick access to medical information on the Web developed by healthcare professionals. HealthAtoZ's aim is to partner with consumers so that every individual and family can better manage their health. It also provides access to MedConnect for healthcare professionals.

Yahoo! partners with the best, most credible companies in the health care industry to provide its users with current, comprehensive and up-to-date information including health research, expert advice, healthy recipes, information on clinical trials, medications and more.

As an institution of the United States government, CDC serves as the national focus for developing and applying disease prevention and control, environmental health, and health promotion and education activities designed to improve the health of the people of the United States. Some of the information provided on the CDC web site includes Travelers' Health, Health Topics A-to-Z, as well as data and statistics.

Healthfinder is a free guide to reliable consumer health and human services information, developed by the U.S. Department of Health and Human Services. Healthfinder includes selected online publications, clearinghouses, databases, web sites, and support/self-help groups, as well as government agencies and not-for-profit organizations that produce reliable information for the public. Healthfinder also has a web site in Spanish.

MEDLINEplus is a goldmine of good health information from the world's largest medical library, the National Library of Medicine. Health professionals and consumers alike can depend on it for information that is authoritative and up-to-date. MEDLINEplus has extensive information from the National Institutes of Health and other trusted sources on about 500 diseases and conditions. There are also lists of hospitals and physicians, a medical encyclopedia and dictionaries, health information in Spanish, extensive information on prescription and non-prescription drugs, health information from the media, and links to thousands of clinical trials.

As an institution of the United States government, the goal of NIH research is to acquire new knowledge to help prevent, detect, diagnose, and treat disease and disability, from the rarest genetic disorder to the common cold. The web site provides an overview of NIH, serving as a point-of-entry to the many individual organizations which make-up NIH, assists users in finding relevant information and services, and highlights important items of interest to the public and the medical research community.

The National Library of Medicine (NLM) is the world's largest medical library. The Library collects materials in all areas of biomedicine and health care, as well as works on biomedical aspects of technology, the humanities, and the physical, life, and social sciences. The collections stand at 5.9 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. The Library's collection may be consulted in the reading room or requested via interlibrary loan.

This web site provides access to eighteen different free online medical dictionaries including Merriam-Webster's Medical Dictionary. Some web sites require registration.

Merck is dedicated to providing reliable, easy-to-use medical information. That is why Merck has published The Merck Manual for 100 years on a not-for-profit basis. This book has become the world's most widely used general medical text and is now published in 14 languages. The latest edition in English is completely searchable on the web site.

Physicians have turned to PDR for the latest word on prescription drugs for over 55 years. PDR is considered the standard prescription drug reference and can be found in virtually every physician's office, hospital and pharmacy in the United States. After registering for free access, this web site provides online reference information to physicians, physician assistants, nurse practitioners, nurses, pharmacists, and consumers.

JAMA began publication in 1883 and is an international peer-reviewed general medical journal, published by the American Medical Association, to promote the science and art of medicine and the betterment of the public health. The online edition contains articles of the JAMA from the most recent through 1998. Most of the articles are available in full text for free or for a small fee.

Founded in 1812, The New England Journal of Medicine (NEJM), published by the Massachusetts Medical Society, is the oldest continuously-published medical journal in the world. It maintains the largest voluntarily-paid circulation of any peer-reviewed scientific journal, reaching physicians and other healthcare professionals in more than 120 countries. Free registration is available online. Once you register, you will receive access to full text of Original and Special Articles six months after publication and the Table of Contents by e-mail. Reprints of articles are available for a small fee.

Even though registration is required for your first visit to the web site, Medical Matrix is a free, large, searchable, peer reviewed, rated, and annotated directory of Internet clinical medical resources. It lists only those sites that meet criteria for information quality and site usability, with an emphasis on usefulness to healthcare practitioners.

The Health Science Guide is an enormous directory, which includes thousands of medical cases and teaching files, many textbooks and tutorials, over 400 journals, over 4000 databases, the Virtual Medical center with links to medical dictionaries in nine languages, information on pharmaceuticals, as well as a link to Martindale's "The Reference Desk," which is an extensive list of science and health-related links, resources, and references.