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 > 2006 ICD-9-CM Diagnosis 279 Disorders involving the immune mechanism View the most recent version of ICD-9-CM 279 279 is a non-specific code that cannot be used to specify a diagnosis