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 531 Gastric ulcer View the most recent version of ICD-9-CM 531 Ulceration of the GASTRIC MUCOSA due to contact with GASTRIC JUICE. It is often associated with HELICOBACTER PYLORI infection or consumption of nonsteroidal anti-inflammatory drugs (NSAIDS). 531 is a non-specific code that cannot be used to specify a diagnosis 531 Includes ulcer (peptic): prepyloric pylorus stomach 531 Excludes peptic ulcer NOS (533.0-533.9)