Convert ICD-10 Code K21.0 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
K21.0 Gastro-esophageal reflux disease with esophagitis		530.11 Reflux esophagitis

ICD-10 to ICD-9 crosswalk for code K21.0 - gastro-esophageal reflux disease with esophagitis based on the most recent General Equivalence Mappings (GEMS) information.