combined immunodeficiency combined T cell and B cell immunodeficiency ORDO:101972 UMLS_CUI:C0494261 Xref MGI. disease_ontology ICD10CM:D81 DOID:628 A primary immunodeficiency disease characterized by impaired T cell-mediated immunity and impaired B cell mediated humoral immunity. Congenital Combined Immunodeficiency NCI:C27871 SNOMEDCT_US_2020_03_01:191003005 OMIM:312863 ICD9CM:279.2 combined immunodeficiency