2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Infectious And Parasitic Diseases 001-139 > Intestinal Infectious Diseases 001-009 > 2006 ICD-9-CM Diagnosis 004 Shigellosis View the most recent version of ICD-9-CM 004 DYSENTERY caused by gram-negative rod-shaped enteric bacteria (ENTEROBACTERIACEAE), most often by the genus SHIGELLA. Shigella dysentery, Shigellosis, is classified into subgroups according to syndrome severity and the infectious species. Group A: SHIGELLA DYSENTERIAE (severest); Group B: SHIGELLA FLEXNERI; Group C: SHIGELLA BOYDII; and Group D: SHIGELLA SONNEI (mildest). 004 is a non-specific code that cannot be used to specify a diagnosis 004 Includes bacillary dysentery