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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  • 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—

    Peptic ulcer, site unspecified

  • 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

  • K27.5—

    Chronic or unspecified peptic ulcer, site unspecified, with perforation

  • K27.6—

    Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforation

  • K27.7—

    Chronic peptic ulcer, site unspecified, without hemorrhage or perforation

  • K27.9—

    Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation

  • K28—

    Gastrojejunal ulcer

  • K28.0—

    Acute gastrojejunal ulcer with hemorrhage

  • K28.1—

    Acute gastrojejunal ulcer with perforation

  • K28.2—

    Acute gastrojejunal ulcer with both hemorrhage and perforation

  • K28.3—

    Acute gastrojejunal ulcer without hemorrhage or perforation

  • K28.4—

    Chronic or unspecified gastrojejunal ulcer with hemorrhage

  • K28.5—

    Chronic or unspecified gastrojejunal ulcer with perforation

  • K28.6—

    Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation

  • K28.7—

    Chronic gastrojejunal ulcer without hemorrhage or perforation

  • K28.9—

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

  • K29—

    Gastritis and duodenitis

  • K29.0—

    Acute gastritis

  • K29.00—

    Acute gastritis without bleeding

  • K29.01—

    Acute gastritis with bleeding

  • K29.2—

    Alcoholic gastritis

  • K29.20—

    Alcoholic gastritis without bleeding

  • K29.21—

    Alcoholic gastritis with bleeding

  • K29.3—

    Chronic superficial gastritis

  • K29.30—

    Chronic superficial gastritis without bleeding

  • K29.31—

    Chronic superficial gastritis with bleeding

  • K29.4—

    Chronic atrophic gastritis

  • K29.40—

    Chronic atrophic gastritis without bleeding

  • K29.41—

    Chronic atrophic gastritis with bleeding

  • K29.5—

    Unspecified chronic gastritis

  • K29.50—

    Unspecified chronic gastritis without bleeding

  • K29.51—

    Unspecified chronic gastritis with bleeding

  • K29.6—

    Other gastritis

  • K29.60—

    Other gastritis without bleeding

  • K29.61—

    Other gastritis with bleeding

  • K29.7—

    Gastritis, unspecified

  • K29.70—

    Gastritis, unspecified, without bleeding

  • K29.71—

    Gastritis, unspecified, with bleeding

  • K29.8—

    Duodenitis

  • K29.80—

    Duodenitis without bleeding

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