ICD-10-CM category
K31 Other diseases of stomach and duodenum
K31 is a category, not a billable code. Report one of the 25 complete codes below.
Codes in K31
- K31.0Acute dilatation of stomach
- K31.1Adult hypertrophic pyloric stenosis
- K31.2Hourglass stricture and stenosis of stomach
- K31.3Pylorospasm, not elsewhere classified
- K31.4Gastric diverticulum
- K31.5Obstruction of duodenum
- K31.6Fistula of stomach and duodenum
- K31.7Polyp of stomach and duodenum
- K31.811Angiodysplasia of stomach and duodenum with bleeding
- K31.819Angiodysplasia of stomach and duodenum without bleeding
- K31.82Dieulafoy lesion (hemorrhagic) of stomach and duodenum
- K31.83Achlorhydria
- K31.84Gastroparesis
- K31.89Other diseases of stomach and duodenum
- K31.9Disease of stomach and duodenum, unspecified
- K31.A0Gastric intestinal metaplasia, unspecified
- K31.A11Gastric intestinal metaplasia without dysplasia, involving the antrum
- K31.A12Gastric intestinal metaplasia without dysplasia, involving the body (corpus)
- K31.A13Gastric intestinal metaplasia without dysplasia, involving the fundus
- K31.A14Gastric intestinal metaplasia without dysplasia, involving the cardia
- K31.A15Gastric intestinal metaplasia without dysplasia, involving multiple sites
- K31.A19Gastric intestinal metaplasia without dysplasia, unspecified site
- K31.A21Gastric intestinal metaplasia with low grade dysplasia
- K31.A22Gastric intestinal metaplasia with high grade dysplasia
- K31.A29Gastric intestinal metaplasia with dysplasia, unspecified
Outside the US? K31 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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