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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  • K14.9|

    Disease of tongue, unspecified

  • K20|

    Esophagitis

  • K20.0|

    Eosinophilic esophagitis

  • K20.8|

    Other esophagitis

  • K20.80|

    Other esophagitis without bleeding

  • K20.81|

    Other esophagitis with bleeding

  • K20.9|

    Esophagitis, unspecified

  • K20.90|

    Esophagitis, unspecified without bleeding

  • K20.91|

    Esophagitis, unspecified with bleeding

  • K21|

    Gastro-esophageal reflux disease

  • K21.0|

    Gastro-esophageal reflux disease with esophagitis

  • 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|

    Other diseases of esophagus

  • K22.0|

    Achalasia of cardia

  • K22.1|

    Ulcer of esophagus

  • 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

  • K22.7|

    Barrett's esophagus

  • K22.70|

    Barrett's esophagus without dysplasia

  • K22.71|

    Barrett's esophagus with 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

  • K22.8|

    Other specified diseases of esophagus

  • 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|

    Gastric ulcer

  • 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|

    Duodenal ulcer

  • K26.0|

    Acute duodenal ulcer with hemorrhage

  • K26.1|

    Acute duodenal ulcer with perforation

  • K26.2|

    Acute duodenal ulcer with both hemorrhage and perforation

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