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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Esophagus, Stomach, And Duodenum 530-538 > Gastric Ulcer 531.* > 2007 ICD-9-CM Diagnosis 531.90 Gastric ulcer unspecified as acute or chronic without hemorrhage or perforation without obstruction  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 Therefore, this code may be out of date.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 531.90 can be accessed here. 531.90 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 531.* hierarchy