diagnosis code for history of  gastroesophageal cancer
Gastro-esophageal reflux disease without esophagitis. 1  K21.9 is a billable ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. 2  Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.