535 Gastritis and duodenitis 
535.0 Acute gastritis 
535.00 Acute gastritis (without hemorrhage) convert 535.00 to ICD-10-CM
535.01 Acute gastritis with hemorrhage convert 535.01 to ICD-10-CM 535.1 Atrophic gastritis 535.10 Atrophic gastritis (without hemorrhage) convert 535.10 to ICD-10-CM 535.11 Atrophic gastritis with hemorrhage convert 535.11 to ICD-10-CM 535.2 Gastric mucosal hypertrophy 535.20 Gastric mucosal hypertrophy (without hemorrhage) convert 535.20 to ICD-10-CM 535.21 Gastric mucosal hypertrophy with hemorrhage convert 535.21 to ICD-10-CM 535.3 Alcoholic gastritis 535.30 Alcoholic gastritis (without hemorrhage) convert 535.30 to ICD-10-CM 535.31 Alcoholic gastritis with hemorrhage convert 535.31 to ICD-10-CM 535.4 Other specified gastritis 535.40 Other specified gastritis (without hemorrhage) convert 535.40 to ICD-10-CM 535.41 Other specified gastritis with hemorrhage convert 535.41 to ICD-10-CM 535.5 Unspecified gastritis and gastroduodenitis 535.50 Unspecified gastritis and gastroduodenitis (without hemorrhage) convert 535.50 to ICD-10-CM 535.51 Unspecified gastritis and gastroduodenitis with hemorrhage convert 535.51 to ICD-10-CM 535.6 Duodenitis 
535.60 Duodenitis (without hemorrhage) convert 535.60 to ICD-10-CM 535.61 Duodenitis with hemorrhage convert 535.61 to ICD-10-CM