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Table 1 ICD 10 GERD diagnostic codes identifying Patients with reflux disease

From: Impact of gastro-oesophageal reflux disease on work productivity despite therapy with proton pump inhibitors in Germany

Code Diagnosis
K21 Gastroesophageal reflux disease
K21.0 Gastroesophageal reflux disease with esophagitis - Reflux esophagitis
K21.9 Gastroesophageal reflux disease without esophagitis
R12 Heartburn - Excludes dyspepsia