Convert ICD-10 Code K31.6 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
K31.6 Fistula of stomach and duodenum		537.4 Gastric/duodenal fistula

ICD-10 to ICD-9 crosswalk for code K31.6 - fistula of stomach and duodenum based on the most recent General Equivalence Mappings (GEMS) information.