unspecified D761 Hemophagocytic lymphohistiocytosis D801 Nonfamilial hypogammaglobulinemia D803 Selective deficiency of immunoglobulin G [IgG] subclasses D809 Immunodeficiency with predominantly antibody defects, unsp D81810 Biotinidase deficiency D819 Combined immunodeficiency, unspecified D839 Common variable immuno...