About Section K20-K31

Section K20-K31 covers Diseases of esophagus, stomach and duodenum within Chapter 11 of the ICD-10-CM Tabular List. This section includes diagnosis codes ranging from K20 to K31. Each code below includes its description, billable status, and links to detailed coding guidelines.
Diagnosis Codes 135 entries
K20EsophagitisNon-Billable›K20.0Eosinophilic esophagitisBillable›K20.8Other esophagitisNon-Billable›K20.80Other esophagitis without bleedingBillable›K20.81Other esophagitis with bleedingBillable›K20.9Esophagitis, unspecifiedNon-Billable›K20.90Esophagitis, unspecified without bleedingBillable›K20.91Esophagitis, unspecified with bleedingBillable›K21Gastro-esophageal reflux diseaseNon-Billable›K21.0Gastro-esophageal reflux disease with esophagitisNon-Billable›K21.00Gastro-esophageal reflux disease with esophagitis, without bleedingBillable›K21.01Gastro-esophageal reflux disease with esophagitis, with bleedingBillable›K21.9Gastro-esophageal reflux disease without esophagitisBillable›K22Other diseases of esophagusNon-Billable›K22.0Achalasia of cardiaBillable›K22.1Ulcer of esophagusNon-Billable›K22.10Ulcer of esophagus without bleedingBillable›K22.11Ulcer of esophagus with bleedingBillable›K22.2Esophageal obstructionBillable›K22.3Perforation of esophagusBillable›K22.4Dyskinesia of esophagusBillable›K22.5Diverticulum of esophagus, acquiredBillable›K22.6Gastro-esophageal laceration-hemorrhage syndromeBillable›K22.7Barrett's esophagusNon-Billable›K22.70Barrett's esophagus without dysplasiaBillable›K22.71Barrett's esophagus with dysplasiaNon-Billable›K22.710Barrett's esophagus with low grade dysplasiaBillable›K22.711Barrett's esophagus with high grade dysplasiaBillable›K22.719Barrett's esophagus with dysplasia, unspecifiedBillable›K22.8Other specified diseases of esophagusNon-Billable›K22.81Esophageal polypBillable›K22.82Esophagogastric junction polypBillable›K22.89Other specified disease of esophagusBillable›K22.9Disease of esophagus, unspecifiedBillable›K23Disorders of esophagus in diseases classified elsewhereBillable›K25Gastric ulcerNon-Billable›K25.0Acute gastric ulcer with hemorrhageBillable›K25.1Acute gastric ulcer with perforationBillable›K25.2Acute gastric ulcer with both hemorrhage and perforationBillable›K25.3Acute gastric ulcer without hemorrhage or perforationBillable›K25.4Chronic or unspecified gastric ulcer with hemorrhageBillable›K25.5Chronic or unspecified gastric ulcer with perforationBillable›K25.6Chronic or unspecified gastric ulcer with both hemorrhage and perforationBillable›K25.7Chronic gastric ulcer without hemorrhage or perforationBillable›K25.9Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable›K26Duodenal ulcerNon-Billable›K26.0Acute duodenal ulcer with hemorrhageBillable›K26.1Acute duodenal ulcer with perforationBillable›K26.2Acute duodenal ulcer with both hemorrhage and perforationBillable›K26.3Acute duodenal ulcer without hemorrhage or perforationBillable›K26.4Chronic or unspecified duodenal ulcer with hemorrhageBillable›K26.5Chronic or unspecified duodenal ulcer with perforationBillable›K26.6Chronic or unspecified duodenal ulcer with both hemorrhage and perforationBillable›K26.7Chronic duodenal ulcer without hemorrhage or perforationBillable›K26.9Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable›K27Peptic ulcer, site unspecifiedNon-Billable›K27.0Acute peptic ulcer, site unspecified, with hemorrhageBillable›K27.1Acute peptic ulcer, site unspecified, with perforationBillable›K27.2Acute peptic ulcer, site unspecified, with both hemorrhage and perforationBillable›K27.3Acute peptic ulcer, site unspecified, without hemorrhage or perforationBillable›K27.4Chronic or unspecified peptic ulcer, site unspecified, with hemorrhageBillable›K27.5Chronic or unspecified peptic ulcer, site unspecified, with perforationBillable›K27.6Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforationBillable›K27.7Chronic peptic ulcer, site unspecified, without hemorrhage or perforationBillable›K27.9Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforationBillable›K28Gastrojejunal ulcerNon-Billable›K28.0Acute gastrojejunal ulcer with hemorrhageBillable›K28.1Acute gastrojejunal ulcer with perforationBillable›K28.2Acute gastrojejunal ulcer with both hemorrhage and perforationBillable›K28.3Acute gastrojejunal ulcer without hemorrhage or perforationBillable›K28.4Chronic or unspecified gastrojejunal ulcer with hemorrhageBillable›K28.5Chronic or unspecified gastrojejunal ulcer with perforationBillable›K28.6Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforationBillable›K28.7Chronic gastrojejunal ulcer without hemorrhage or perforationBillable›K28.9Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforationBillable›K29Gastritis and duodenitisNon-Billable›K29.0Acute gastritisNon-Billable›K29.00Acute gastritis without bleedingBillable›K29.01Acute gastritis with bleedingBillable›K29.2Alcoholic gastritisNon-Billable›K29.20Alcoholic gastritis without bleedingBillable›K29.21Alcoholic gastritis with bleedingBillable›K29.3Chronic superficial gastritisNon-Billable›K29.30Chronic superficial gastritis without bleedingBillable›K29.31Chronic superficial gastritis with bleedingBillable›K29.4Chronic atrophic gastritisNon-Billable›K29.40Chronic atrophic gastritis without bleedingBillable›K29.41Chronic atrophic gastritis with bleedingBillable›K29.5Unspecified chronic gastritisNon-Billable›K29.50Unspecified chronic gastritis without bleedingBillable›K29.51Unspecified chronic gastritis with bleedingBillable›K29.6Other gastritisNon-Billable›K29.60Other gastritis without bleedingBillable›K29.61Other gastritis with bleedingBillable›K29.7Gastritis, unspecifiedNon-Billable›K29.70Gastritis, unspecified, without bleedingBillable›K29.71Gastritis, unspecified, with bleedingBillable›K29.8DuodenitisNon-Billable›K29.80Duodenitis without bleedingBillable›K29.81Duodenitis with bleedingBillable›K29.9Gastroduodenitis, unspecifiedNon-Billable›K29.90Gastroduodenitis, unspecified, without bleedingBillable›K29.91Gastroduodenitis, unspecified, with bleedingBillable›K30Functional dyspepsiaBillable›K31Other diseases of stomach and duodenumNon-Billable›K31.0Acute dilatation of stomachBillable›K31.1Adult hypertrophic pyloric stenosisBillable›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 duodenumNon-Billable›K31.81Angiodysplasia of stomach and duodenumNon-Billable›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 metaplasiaNon-Billable›K31.A0Gastric intestinal metaplasia, unspecifiedBillable›K31.A1Gastric intestinal metaplasia without dysplasiaNon-Billable›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 dysplasiaNon-Billable›K31.A21Gastric intestinal metaplasia with low grade dysplasiaBillable›K31.A22Gastric intestinal metaplasia with high grade dysplasiaBillable›K31.A29Gastric intestinal metaplasia with dysplasia, unspecifiedBillable›