Medical and healthcare information on the Internet continues to expand. It not only increases in the number of sites, but old sites change titles, addresses, ownership, content, and organization, and many die each year. About 95% of the 1000 sites in our database changed from 2007 to 2012. New sites are being created each year and the best are added to this directory.

The Medical Internet Directory was started in 1995 to support volunteer work for the Medical Library, Monmouth Medical Center, Long Branch, New Jersey. The purpose was to familiarize incoming residents with Internet medical resources. Not much was known then and the directory was only one typed page. The first edition with a hundred or so sites was published in book form in 1997; the fifth and last book edition was published in 2005. The sixth edition was published free online in 2007 with about 1000.

The directory was organized from the beginning as a structured hierarchical database, and was presented in book format and then online in PDF format. It is now totally reorganized using MySQL.

The site addresses are Domain Name only and all sites are single entry, non-repeating, and not cross referenced.

The sources for this directory are based on many government organizations, medical associations and societies, universities, and hospital free libraries. The important sources are the National Institutes of Health, National Library of Medicine, Centers for Disease Control, other related government agencies, the Medical Library Association. Major search engines are searched frequently. Databases in the Deep Web are also searched.