2006 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.* > 2006 ICD-9-CM Diagnosis 279.1 Deficiency of cell-mediated immunity View the most recent version of ICD-9-CM 279.1 279.1 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 279.* hierarchy