2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Other Metabolic Disorders And Immunity Disorders 270-279 > Disorders Involving The Immune Mechanism 279.* > 2008 ICD-9-CM Diagnosis 279.3 Unspecified immunity deficiency  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 279.3 can be accessed here. Syndromes in which there is a deficiency or defect in the mechanisms of immunity, either cellular or humoral. The decreased ability of the body to fight infection and disease. The inability of the body to produce an immune response. 279.3 is a specific code that can be used to specify a diagnosis 279.3 contains 2 index entries View the ICD-9-CM Volume 1 279.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 279.3: Deficiency, deficient immunity NEC 279.3 cell-mediated 279.10 with hyperimmunoglobulinemia 279.2 thrombocytopenia and eczema 279.12 specified NEC 279.19 combined (severe) 279.2 syndrome 279.2 common variable 279.06 humoral NEC 279.00 IgA (secretory) 279.01 IgG 279.03 IgM 279.02 Immunodeficiency 279.3 with adenosine-deaminase deficiency 279.2 defect, predominant B-cell 279.00 T-cell 279.10 hyperimmunoglobulinemia 279.2 lymphopenia, hereditary 279.2 thrombocytopenia and eczema 279.12 thymic aplasia 279.2 dysplasia 279.2 autosomal recessive, Swiss-type 279.2 common variable 279.06 severe combined (SCID) 279.2 to Rh factor affecting management of pregnancy 656.1 fetus or newborn 773.0 X-linked, with increased IgM 279.05