K20-K31Not billable, use a more specific code below
Diseases of esophagus, stomach and duodenum (K20-K31)
chapter 11: Diseases of the Digestive System
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Instructional notes
Excludes2: not included here, code separately if applicable
- hiatus hernia (K44.-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.
All codes under K20-K31
K20-K31 can't be used on a claim. Pick a billable code below; grey headings group them.
- K20Esophagitis
- K20.0Eosinophilic esophagitis
- K20.8Other esophagitis
- K20.80Other esophagitis without bleeding
- K20.81Other esophagitis with bleeding
- K20.9Esophagitis, unspecified
- K20.90Esophagitis, unspecified without bleeding
- K20.91Esophagitis, unspecified with bleeding
- K21Gastro-esophageal reflux disease
- K21.0Gastro-esophageal reflux disease with esophagitis
- K21.00Gastro-esophageal reflux disease with esophagitis, without bleeding
- K21.01Gastro-esophageal reflux disease with esophagitis, with bleeding
- K21.9Gastro-esophageal reflux disease without esophagitis
- K22Other diseases of esophagus
- K22.0Achalasia of cardia
- K22.1Ulcer of esophagus
- K22.10Ulcer of esophagus without bleeding
- K22.11Ulcer of esophagus with bleeding
- K22.2Esophageal obstruction
- K22.3Perforation of esophagus
- K22.4Dyskinesia of esophagus
- K22.5Diverticulum of esophagus, acquired
- K22.6Gastro-esophageal laceration-hemorrhage syndrome
- K22.7Barrett's esophagus
- K22.70Barrett's esophagus without dysplasia
- K22.71Barrett's esophagus with dysplasia
- K22.710Barrett's esophagus with low grade dysplasia
- K22.711Barrett's esophagus with high grade dysplasia
- K22.719Barrett's esophagus with dysplasia, unspecified
- K22.8Other specified diseases of esophagus
- K22.81Esophageal polyp
- K22.82Esophagogastric junction polyp
- K22.89Other specified disease of esophagus
- K22.9Disease of esophagus, unspecified
- K23Disorders of esophagus in diseases classified elsewhere
- K25Gastric ulcer
- K25.0Acute gastric ulcer with hemorrhage
- K25.1Acute gastric ulcer with perforation
- K25.2Acute gastric ulcer with both hemorrhage and perforation
- K25.3Acute gastric ulcer without hemorrhage or perforation
- K25.4Chronic or unspecified gastric ulcer with hemorrhage
- K25.5Chronic or unspecified gastric ulcer with perforation
- K25.6Chronic or unspecified gastric ulcer with both hemorrhage and perforation
- K25.7Chronic gastric ulcer without hemorrhage or perforation
- K25.9Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation
- K26Duodenal ulcer
- K26.0Acute duodenal ulcer with hemorrhage
- K26.1Acute duodenal ulcer with perforation
- K26.2Acute duodenal ulcer with both hemorrhage and perforation
- K26.3Acute duodenal ulcer without hemorrhage or perforation
- K26.4Chronic or unspecified duodenal ulcer with hemorrhage
- K26.5Chronic or unspecified duodenal ulcer with perforation
- K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforation
- K26.7Chronic duodenal ulcer without hemorrhage or perforation
- K26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
- K27Peptic ulcer, site unspecified
- K27.0Acute peptic ulcer, site unspecified, with hemorrhage
- K27.1Acute peptic ulcer, site unspecified, with perforation
- K27.2Acute peptic ulcer, site unspecified, with both hemorrhage and perforation
- K27.3Acute peptic ulcer, site unspecified, without hemorrhage or perforation
- K27.4Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage
- K27.5Chronic or unspecified peptic ulcer, site unspecified, with perforation
- K27.6Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation
- K27.7Chronic peptic ulcer, site unspecified, without hemorrhage or perforation
- K27.9Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation
- K28Gastrojejunal ulcer
- K28.0Acute gastrojejunal ulcer with hemorrhage
- K28.1Acute gastrojejunal ulcer with perforation
- K28.2Acute gastrojejunal ulcer with both hemorrhage and perforation
- K28.3Acute gastrojejunal ulcer without hemorrhage or perforation
- K28.4Chronic or unspecified gastrojejunal ulcer with hemorrhage
- K28.5Chronic or unspecified gastrojejunal ulcer with perforation
- K28.6Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation
- K28.7Chronic gastrojejunal ulcer without hemorrhage or perforation
- K28.9Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
- K29Gastritis and duodenitis
- K29.0Acute gastritis
- K29.00Acute gastritis without bleeding
- K29.01Acute gastritis with bleeding
- K29.2Alcoholic gastritis
- K29.20Alcoholic gastritis without bleeding
- K29.21Alcoholic gastritis with bleeding
- K29.3Chronic superficial gastritis
- K29.30Chronic superficial gastritis without bleeding
- K29.31Chronic superficial gastritis with bleeding
- K29.4Chronic atrophic gastritis
- K29.40Chronic atrophic gastritis without bleeding
- K29.41Chronic atrophic gastritis with bleeding
- K29.5Unspecified chronic gastritis
- K29.50Unspecified chronic gastritis without bleeding
- K29.51Unspecified chronic gastritis with bleeding
- K29.6Other gastritis
- K29.60Other gastritis without bleeding
- K29.61Other gastritis with bleeding
- K29.7Gastritis, unspecified
- K29.70Gastritis, unspecified, without bleeding
- K29.71Gastritis, unspecified, with bleeding
- K29.8Duodenitis
- K29.80Duodenitis without bleeding
- K29.81Duodenitis with bleeding
- K29.9Gastroduodenitis, unspecified
- K29.90Gastroduodenitis, unspecified, without bleeding
- K29.91Gastroduodenitis, unspecified, with bleeding
- K30Functional dyspepsia
- K31Other diseases of stomach and duodenum
- 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
- K31.8Other specified diseases of stomach and duodenum
- K31.81Angiodysplasia 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.AGastric intestinal metaplasia
- K31.A0Gastric intestinal metaplasia, unspecified
- K31.A1Gastric intestinal metaplasia without dysplasia
- 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.A2Gastric intestinal metaplasia with dysplasia
- K31.A21Gastric intestinal metaplasia with low grade dysplasia
- K31.A22Gastric intestinal metaplasia with high grade dysplasia
- K31.A29Gastric intestinal metaplasia with dysplasia, unspecified
- K31.BHypertrophic pyloric stenosis, in childhood
K20-K31 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Esophagus Disorders
Esophagus disorders are problems with how your esophagus works. The esophagus is the tube that carries food from your mouth to your stomach. You usually don't notice it unless you swallow something too big, hot, or cold. You might also notice it if something is wrong. When that happens, you might feel pain or have trouble swallowing (dysphagia).
Read more about esophagus disorders on MedlinePlus