|Description||Catalog of all known human genes and genetic phenotypes.|
|Genes, genetic disorders, phenotypic traits|
|Research center||Johns Hopkins University School of Medicine|
|Primary citation||PMID 21472891|
Online Mendelian Inheritance in Man (OMIM) is a continuously updated catalog of human genes and genetic disorders and traits, with a particular focus on the gene-phenotype relationship. As of 28 June 2019[update], approximately 9,000 of the over 25,000 entries in OMIM represented phenotypes; the rest represented genes, many of which were related to known phenotypes.
OMIM is the online continuation of Victor A. McKusick's Mendelian Inheritance in Man (MIM), which was published in 12 editions between 1966 and 1998. Nearly all of the 1,486 entries in the first edition of MIM discussed phenotypes.
MIM/OMIM is produced and curated at the Johns Hopkins School of Medicine (JHUSOM). OMIM became available on the internet in 1987 under the direction of the Welch Medical Library at JHUSOM with financial support from the Howard Hughes Medical Institute. From 1995 to 2010, OMIM was available on the World Wide Web with informatics and financial support from the National Center for Biotechnology Information. The current OMIM website (OMIM.org), which was developed with funding from JHUSOM, is maintained by Johns Hopkins University with financial support from the National Human Genome Research Institute.
The content of MIM/OMIM is based on selection and review of the published peer-reviewed biomedical literature. Updating of content is performed by a team of science writers and curators under the direction of Ada Hamosh at the McKusick-Nathans Institute of Genetic Medicine of Johns Hopkins University. While OMIM is freely available to the public, it is designed for use primarily by physicians and other health care professionals concerned with genetic disorders, by genetics researchers, and by advanced students in science and medicine.
The database may be used as a resource for locating literature relevant to inherited conditions, and its numbering system is widely used in the medical literature to provide a unified index for genetic diseases.
See also: List of OMIM disorder codes
Each OMIM entry is given a unique six-digit identifier as summarized below:
In cases of allelic heterogeneity, the MIM number of the entry is followed by a decimal point and a unique 4-digit number specifying the variant. For example, allelic variants in the HBB gene (141900) are numbered 141900.0001 through 141900.0538.
Because OMIM has responsibility for the classification and naming of genetic disorders, these numbers are stable identifiers of the disorders.
Symbols preceding MIM numbers indicate the entry category: