The MIMmatch service available at OMIM.org provides an easy way for users to follow updates to genes and phenotypes of interest, stay current on new disease-gene relationships, find other scientists with similar interests, and save searches. In addition, MIMmatch users are permitted to download up to 1000 entries. Currently MIMmatch has over 2200 registrants. The names of MIMmatch users are not shared with any third party, and no more than one e-mail notification per day is sent. Users need to register with a valid e-mail address and confirm the registration to activate the account. OMIM’s help menus provide answers to Frequently Asked Questions, detailed search and API help. These documents also give an overview of the data structure of OMIM. A detailed guide to searching OMIM is now provided in a chapter in Current Protocols (8), and video tutorials on searching OMIM and using MIMmatch are available from multiple links on the OMIM.org website.
