ICD-10-CM > K00-K95 > K20-K31 > K29 K29 Gastritis and duodenitis Non-Billable/Non-Specific Type 1 Excludes eosinophilic gastritis or gastroenteritis (K52.81)Zollinger-Ellison syndrome (E16.4) Codes K29.0Acute gastritisK29.00Acute gastritis without bleedingK29.01Acute gastritis with bleedingK29.2Alcoholic gastritisK29.20Alcoholic gastritis without bleedingK29.21Alcoholic gastritis with bleedingK29.3Chronic superficial gastritisK29.30Chronic superficial gastritis without bleedingK29.31Chronic superficial gastritis with bleedingK29.4Chronic atrophic gastritisK29.40Chronic atrophic gastritis without bleedingK29.41Chronic atrophic gastritis with bleedingK29.5Unspecified chronic gastritisK29.50Unspecified chronic gastritis without bleedingK29.51Unspecified chronic gastritis with bleedingK29.6Other gastritisK29.60Other gastritis without bleedingK29.61Other gastritis with bleedingK29.7Gastritis, unspecifiedK29.70Gastritis, unspecified, without bleedingK29.71Gastritis, unspecified, with bleedingK29.8DuodenitisK29.80Duodenitis without bleedingK29.81Duodenitis with bleedingK29.9Gastroduodenitis, unspecifiedK29.90Gastroduodenitis, unspecified, without bleedingK29.91Gastroduodenitis, unspecified, with bleeding