2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Esophagus, Stomach, And Duodenum 530-537 > 2006 ICD-9-CM Diagnosis 535 Gastritis and duodenitis View the most recent version of ICD-9-CM 535 535 is a non-specific code that cannot be used to specify a diagnosis