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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Hernia Of Abdominal Cavity 550-553 > Inguinal Hernia 550.* > 2007 ICD-9-CM Diagnosis 550.01 Recurrent unilateral or unspecified inguinal hernia with gangrene  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 Therefore, this code may be out of date.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 550.01 can be accessed here. 550.01 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 550.* hierarchy