All ICD10 Codes
Chapter 11

K00–K95: Diseases of the Digestive System

Diseases of the Digestive System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
All CodesBillable Only
Internal Codes
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  • K14.8—

    Other diseases of tongue

  • K14.9—

    Disease of tongue, unspecified

  • K20.0—

    Eosinophilic esophagitis

  • K20.80—

    Other esophagitis without bleeding

  • K20.81—

    Other esophagitis with bleeding

  • K20.90—

    Esophagitis, unspecified without bleeding

  • K20.91—

    Esophagitis, unspecified with bleeding

  • K21.00—

    Gastro-esophageal reflux disease with esophagitis, without bleeding

  • K21.01—

    Gastro-esophageal reflux disease with esophagitis, with bleeding

  • K21.9—

    Gastro-esophageal reflux disease without esophagitis

  • K22.0—

    Achalasia of cardia

  • K22.10—

    Ulcer of esophagus without bleeding

  • K22.11—

    Ulcer of esophagus with bleeding

  • K22.2—

    Esophageal obstruction

  • K22.3—

    Perforation of esophagus

  • K22.4—

    Dyskinesia of esophagus

  • K22.5—

    Diverticulum of esophagus, acquired

  • K22.6—

    Gastro-esophageal laceration-hemorrhage syndrome

  • K22.70—

    Barrett's esophagus without dysplasia

  • K22.710—

    Barrett's esophagus with low grade dysplasia

  • K22.711—

    Barrett's esophagus with high grade dysplasia

  • K22.719—

    Barrett's esophagus with dysplasia, unspecified

  • K22.81—

    Esophageal polyp

  • K22.82—

    Esophagogastric junction polyp

  • K22.89—

    Other specified disease of esophagus

  • K22.9—

    Disease of esophagus, unspecified

  • K23—

    Disorders of esophagus in diseases classified elsewhere

  • K25.0—

    Acute gastric ulcer with hemorrhage

  • K25.1—

    Acute gastric ulcer with perforation

  • K25.2—

    Acute gastric ulcer with both hemorrhage and perforation

  • K25.3—

    Acute gastric ulcer without hemorrhage or perforation

  • K25.4—

    Chronic or unspecified gastric ulcer with hemorrhage

  • K25.5—

    Chronic or unspecified gastric ulcer with perforation

  • K25.6—

    Chronic or unspecified gastric ulcer with both hemorrhage and perforation

  • K25.7—

    Chronic gastric ulcer without hemorrhage or perforation

  • K25.9—

    Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation

  • K26.0—

    Acute duodenal ulcer with hemorrhage

  • K26.1—

    Acute duodenal ulcer with perforation

  • K26.2—

    Acute duodenal ulcer with both hemorrhage and perforation

  • K26.3—

    Acute duodenal ulcer without hemorrhage or perforation

  • K26.4—

    Chronic or unspecified duodenal ulcer with hemorrhage

  • K26.5—

    Chronic or unspecified duodenal ulcer with perforation

  • K26.6—

    Chronic or unspecified duodenal ulcer with both hemorrhage and perforation

  • K26.7—

    Chronic duodenal ulcer without hemorrhage or perforation

  • K26.9—

    Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

  • K27.0—

    Acute peptic ulcer, site unspecified, with hemorrhage

  • K27.1—

    Acute peptic ulcer, site unspecified, with perforation

  • K27.2—

    Acute peptic ulcer, site unspecified, with both hemorrhage and perforation

  • K27.3—

    Acute peptic ulcer, site unspecified, without hemorrhage or perforation

  • K27.4—

    Chronic or unspecified peptic ulcer, site unspecified, with hemorrhage

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