Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

K31

Other diseases of stomach and duodenum

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
K31.0Acute dilatation of stomachBillable
K31.1Adult hypertrophic pyloric stenosisBillable
K31.BHypertrophic pyloric stenosis, in childhoodBillable
K31.2Hourglass stricture and stenosis of stomachBillable
K31.3Pylorospasm, not elsewhere classifiedBillable
K31.4Gastric diverticulumBillable
K31.5Obstruction of duodenumBillable
K31.6Fistula of stomach and duodenumBillable
K31.7Polyp of stomach and duodenumBillable
K31.8Other specified diseases of stomach and duodenumCategory
K31.81Angiodysplasia of stomach and duodenumCategory
K31.811Angiodysplasia of stomach and duodenum with bleedingBillable
K31.819Angiodysplasia of stomach and duodenum without bleedingBillable
K31.82Dieulafoy lesion (hemorrhagic) of stomach and duodenumBillable
K31.83AchlorhydriaBillable
K31.84GastroparesisBillable
K31.89Other diseases of stomach and duodenumBillable
K31.9Disease of stomach and duodenum, unspecifiedBillable
K31.AGastric intestinal metaplasiaCategory
K31.A0Gastric intestinal metaplasia, unspecifiedBillable
K31.A1Gastric intestinal metaplasia without dysplasiaCategory
K31.A11Gastric intestinal metaplasia without dysplasia, involving the antrumBillable
K31.A12Gastric intestinal metaplasia without dysplasia, involving the body (corpus)Billable
K31.A13Gastric intestinal metaplasia without dysplasia, involving the fundusBillable
K31.A14Gastric intestinal metaplasia without dysplasia, involving the cardiaBillable
K31.A15Gastric intestinal metaplasia without dysplasia, involving multiple sitesBillable
K31.A19Gastric intestinal metaplasia without dysplasia, unspecified siteBillable
K31.A2Gastric intestinal metaplasia with dysplasiaCategory
K31.A21Gastric intestinal metaplasia with low grade dysplasiaBillable
K31.A22Gastric intestinal metaplasia with high grade dysplasiaBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.