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2007 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.* > 2007 ICD-9-CM Diagnosis 279.2 Combined 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 Therefore, this code may be out of date.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 279.2 can be accessed here. Group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an X-linked or autosomal recessive defect. About half of the patients with autosomal recessive SCID are deficient in the enzyme adenosine deaminase. Rare congenital disorder inherited as an X-linked defect characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. X-linked or autosomal recessive disorder characterized by defects of both humoral and cell mediated immunity, resulting in low or absent antibody levels, leukopenia, marked susceptibility to infections, and early death.--2004 279.2 is a specific code that can be used to specify a diagnosis 279.2 contains 21 index entries View the ICD-9-CM Volume 1 279.* hierarchy 279.2 also known as: Agammaglobulinemia: autosomal recessive Swiss-type X-linked recessive Severe combined immunodeficiency [SCID] Thymic: alymphoplasia aplasia or dysplasia with immunodeficiency 279.2 excludes: thymic hypoplasia (279.11) Index entries containing 279.2: Agammaglobulinemia 279.00 with lymphopenia 279.2 Swiss-type 279.2 Alymphocytosis (pure) 279.2 Alymphoplasia, thymic 279.2 Aplasia - see also Agenesis thymic, with immunodeficiency 279.2 Deficiency, deficient immunity NEC 279.3 cell-mediated 279.10 with hyperimmunoglobulinemia 279.2 combined (severe) 279.2 syndrome 279.2 thymolymphatic 279.2 Dysgenesis reticular 279.2 Dysplasia - see also Anomaly thymic, with immunodeficiency 279.2 Immunodeficiency 279.3 with adenosine-deaminase deficiency 279.2 hyperimmunoglobulinemia 279.2 lymphopenia, hereditary 279.2 thymic aplasia 279.2 dysplasia 279.2 autosomal recessive, Swiss-type 279.2 severe combined (SCID) 279.2 Lymphopenia 288.51 familial 279.2 Syndrome - see also Disease combined immunity deficiency 279.2 immunity deficiency, combined 279.2