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 533 Peptic ulcer site unspecified View the most recent version of ICD-9-CM 533 Ulcer that occurs in the regions of the GASTROINTESTINAL TRACT which come into contact with GASTRIC JUICE containing PEPSIN and GASTRIC ACID. It occurs when there are defects in the MUCOSA barrier. The common forms of peptic ulcers are associated with HELICOBACTER PYLORI and the consumption of nonsteroidal anti-inflammatory drugs (NSAIDS). 533 is a non-specific code that cannot be used to specify a diagnosis 533 Includes gastroduodenal ulcer NOS peptic ulcer NOS stress ulcer NOS 533 Excludes peptic ulcer: duodenal (532.0-532.9) gastric (531.0-531.9)