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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 550.9 Inguinal hernia without mention of obstruction or 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 Therefore, this code may be out of date.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 550.9 can be accessed here. An abdominal hernia with an external bulge in the GROIN region. It can be classified by the location of herniation. Indirect inguinal hernias occur through the internal inguinal ring. Direct inguinal hernias occur through defects in the ABDOMINAL WALL (transversalis fascia) in Hesselbach's triangle. The former type is commonly seen in children and young adults; the latter in adults. 550.9 is a non-specific code that cannot be used to specify a diagnosis 550.9 contains 3 index entries View the ICD-9-CM Volume 1 550.* hierarchy 550.9 also known as: Inguinal hernia NOS Index entries containing 550.9: Hernia, hernial (acquired) (recurrent) 553.9 inguinal (direct) (double) (encysted) (external) (funicular) (indirect) (infantile) (internal) (interstitial) (oblique) (scrotal) (sliding) 550.9 with gangrene (obstructed) 550.0 obstruction 550.1 and gangrene 550.0 testis (nontraumatic) 550.9 meaning scrotal hernia 550.9 symptomatic late syphilis 095.8