gastrointestinal system disease gastroesophageal reflux disease true SNOMEDCT_US_2018_03_01:54856001 ICD10CM:K21.9 A chronic disorder characterized by reflux of the gastric and/or duodenal contents into the distal esophagus. It is usually caused by incompetence of the lower esophageal sphincter. Symptoms include heartburn and acid indigestion. It may cause injury to the esophageal mucosa. disease_ontology OMIM mapping confirmed by DO. [SN]. UMLS_CUI:C0017168 DOID:8534 Gastroesophageal reflux Acid reflux OMIM:109350 GERD Gastro-esophageal reflux Gastresophageal reflux ICD9CM:530.81 MTHICD9_2006:530.81 MESH:D005764 https://www.ncbi.nlm.nih.gov/books/NBK2609/ Gastroesophageal reflux disease GERD - Gastro-esophageal reflux disease NCI:C26781 NCI2004_11_17:C26781 ICD10CM:K21