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K31.819

K31.819Angiodysplasia of stomach and duodenum without bleeding

Billable / specific codeICD-10-CM

K31.819 is a billable, specific ICD-10-CM code for angiodysplasia of stomach and duodenum without bleeding. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Angiodysplasia of stomach and duodenum NOS

Risk adjustment

K31.819 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

K31.819 is named in 4 Medicare coverage policies 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56389Billing and Coding: Upper Gastrointestinal Endoscopy and Visualization
  • A56421Billing and Coding: CT of the Abdomen and Pelvis
  • A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
  • A57414Billing and Coding: Upper Gastrointestinal Endoscopy (Diagnostic and Therapeutic)

How K31.819 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K31.819.

  • Watermelon stomach
  • Angiodysplasiaduodenum(and stomach)
  • Angiodysplasiastomach(and duodenum)
  • Ectasia, ectasisgastric antral vascular(GAVE)
  • Watermelon stomachwithout hemorrhage
  • Ectasia, ectasisgastric antral vascularwithout hemorrhage

Related codes at this level

Codes that share K31.81. If K31.819 is not quite right, the correct code is usually one of these.

Questions about K31.819

Is K31.819 a billable ICD-10-CM code?
Yes. K31.819 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does K31.819 sit in the tabular list?
Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.