K29.9Non-Billable (Header)Gastroduodenitis, unspecifiedChild CodesK29.90Gastroduodenitis, unspecified, without bleedingK29.91Gastroduodenitis, unspecified, with bleedingCode Hierarchy└K29Gastritis and duodenitis└K29.9Gastroduodenitis, unspecified└K29.9Gastroduodenitis, unspecified