ICD-10-CM > K00-K95 > K20-K31 > K29 > K29.5 K29.5 Unspecified chronic gastritis Non-Billable/Non-Specific Applicable To Chronic antral gastritisChronic fundal gastritis Codes K29.50Unspecified chronic gastritis without bleedingK29.51Unspecified chronic gastritis with bleeding