ICD-10-CM > K00-K95 > K20-K31 > K31 > K31.8 > K31.81 K31.81 Angiodysplasia of stomach and duodenum Non-Billable/Non-Specific Codes K31.811Angiodysplasia of stomach and duodenum with bleedingK31.819Angiodysplasia of stomach and duodenum without bleeding