Idiopathic Cd4 Lymphocytopenia is related to immunodeficiency 13 and lymphopenia. An important gene associated with Idiopathic Cd4 Lymphocytopenia is UNC119 (Unc-119 Lipid Binding Chaperone). The drugs Lenograstim and Plerixafor have been mentioned in the context of this disorder. Affiliated tissues include t cells and bone marrow.