OMIM uses genomic reference build GRCh38. The genes in OMIM are mapped to NCBI Entrez IDs and Ensembl IDs based on tables available at NCBI. Genomic coordinate searches can be performed in the Gene Map search option. OMIM’s gene map is used to display the phenotype–gene/gene–phenotype relationship tables, phenotypic series and gene map views. A field describing inheritance information for phenotypes is displayed in these views and is available in the genemap download file.
