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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  • K56.600—

    Partial intestinal obstruction, unspecified as to cause

  • K56.601—

    Complete intestinal obstruction, unspecified as to cause

  • K56.609—

    Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction

  • K56.690—

    Other partial intestinal obstruction

  • K56.691—

    Other complete intestinal obstruction

  • K56.699—

    Other intestinal obstruction unspecified as to partial versus complete obstruction

  • K56.7—

    Ileus, unspecified

  • K57.00—

    Diverticulitis of small intestine with perforation and abscess without bleeding

  • K57.01—

    Diverticulitis of small intestine with perforation and abscess with bleeding

  • K57.10—

    Diverticulosis of small intestine without perforation or abscess without bleeding

  • K57.11—

    Diverticulosis of small intestine without perforation or abscess with bleeding

  • K57.12—

    Diverticulitis of small intestine without perforation or abscess without bleeding

  • K57.13—

    Diverticulitis of small intestine without perforation or abscess with bleeding

  • K57.20—

    Diverticulitis of large intestine with perforation and abscess without bleeding

  • K57.21—

    Diverticulitis of large intestine with perforation and abscess with bleeding

  • K57.30—

    Diverticulosis of large intestine without perforation or abscess without bleeding

  • K57.31—

    Diverticulosis of large intestine without perforation or abscess with bleeding

  • K57.32—

    Diverticulitis of large intestine without perforation or abscess without bleeding

  • K57.33—

    Diverticulitis of large intestine without perforation or abscess with bleeding

  • K57.40—

    Diverticulitis of both small and large intestine with perforation and abscess without bleeding

  • K57.41—

    Diverticulitis of both small and large intestine with perforation and abscess with bleeding

  • K57.50—

    Diverticulosis of both small and large intestine without perforation or abscess without bleeding

  • K57.51—

    Diverticulosis of both small and large intestine without perforation or abscess with bleeding

  • K57.52—

    Diverticulitis of both small and large intestine without perforation or abscess without bleeding

  • K57.53—

    Diverticulitis of both small and large intestine without perforation or abscess with bleeding

  • K57.80—

    Diverticulitis of intestine, part unspecified, with perforation and abscess without bleeding

  • K57.81—

    Diverticulitis of intestine, part unspecified, with perforation and abscess with bleeding

  • K57.90—

    Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding

  • K57.91—

    Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding

  • K57.92—

    Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding

  • K57.93—

    Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding

  • K58.0—

    Irritable bowel syndrome with diarrhea

  • K58.1—

    Irritable bowel syndrome with constipation

  • K58.2—

    Mixed irritable bowel syndrome

  • K58.8—

    Other irritable bowel syndrome

  • K58.9—

    Irritable bowel syndrome, unspecified

  • K59.00—

    Constipation, unspecified

  • K59.01—

    Slow transit constipation

  • K59.02—

    Outlet dysfunction constipation

  • K59.03—

    Drug induced constipation

  • K59.04—

    Chronic idiopathic constipation

  • K59.09—

    Other constipation

  • K59.1—

    Functional diarrhea

  • K59.2—

    Neurogenic bowel, not elsewhere classified

  • K59.31—

    Toxic megacolon

  • K59.39—

    Other megacolon

  • K59.4—

    Anal spasm

  • K59.81—

    Ogilvie syndrome

  • K59.89—

    Other specified functional intestinal disorders

  • K59.9—

    Functional intestinal disorder, unspecified

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