K31
⚠ Non-billable (Header)Other diseases of stomach and duodenum
Diseases of the digestive system (K00-K95)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ Includes
- • functional disorders of stomach
⚠️ Excludes2
directMay be coded together if both conditions coexist
- • diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
- • diverticulum of duodenum (K57.00-K57.13)
Child Codes (11)
K31.0Acute dilatation of stomachK31.1Adult hypertrophic pyloric stenosisK31.2Hourglass stricture and stenosis of stomachK31.3Pylorospasm, not elsewhere classifiedK31.4Gastric diverticulumK31.5Obstruction of duodenumK31.6Fistula of stomach and duodenumK31.7Polyp of stomach and duodenumK31.8Other specified diseases of stomach and duodenumK31.9Disease of stomach and duodenum, unspecifiedK31.AGastric intestinal metaplasia
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CodeK31
BillableNo — Header code
CategoryDiseases of the digestive system (K00-K95)
Excludes10 rule(s)
Excludes22 note(s)
Child codes11
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)