K29: Gastritis and duodenitis


In outpatient care, the ICD code on medical documents is always appended with a diagnostic confidence indicator (A, G, V or Z): A (excluded diagnosis), G (confirmed diagnosis), V (tentative diagnosis) and Z (condition after a confirmed diagnosis).


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Typical symptoms of acute gastritis are stomachache, feeling full, bloating, gas and heartburn. In most cases, gastritis is caused by a bacterial infection or the use of certain pain medication.