537 Other disorders of stomach and duodenum 
537.0 Acquired hypertrophic pyloric stenosis convert 537.0 to ICD-10-CM 537.1 Gastric diverticulum convert 537.1 to ICD-10-CM 537.2 Chronic duodenal ileus convert 537.2 to ICD-10-CM 537.3 Other obstruction of duodenum convert 537.3 to ICD-10-CM 537.4 Fistula of stomach or duodenum convert 537.4 to ICD-10-CM 537.5 Gastroptosis convert 537.5 to ICD-10-CM 537.6 Hourglass stricture or stenosis of stomach convert 537.6 to ICD-10-CM 537.8 Other specified disorders of stomach and duodenum 
537.81 Pylorospasm convert 537.81 to ICD-10-CM 537.82 Angiodysplasia of stomach and duodenum without mention of hemorrhage convert 537.82 to ICD-10-CM 537.83 Angiodysplasia of stomach and duodenum with hemorrhage convert 537.83 to ICD-10-CM 537.84 Dieulafoy lesion (hemorrhagic) of stomach and duodenum convert 537.84 to ICD-10-CM
537.89 Other specified disorders of stomach and duodenum convert 537.89 to ICD-10-CM 537.9 Unspecified disorder of stomach and duodenum convert 537.9 to ICD-10-CM