allergic disease allergic disease UMLS_CUI:C0020517 ICD10CM:T78.40 DOID:1205 MESH:D006967 NCI:C3114 SNOMEDCT_US_2020_03_01:257550005 An immune system disease that is an exaggerated immune response to allergens, such as insect venom, dust mites, pollen, pet dander, drugs or some foods. allergic hypersensitivity disease disease_ontology hypersensitivity hypersensitivity reaction type I disease immune system disease