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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  • K50.81—

    Crohn's disease of both small and large intestine with complications

  • K50.811—

    Crohn's disease of both small and large intestine with rectal bleeding

  • K50.812—

    Crohn's disease of both small and large intestine with intestinal obstruction

  • K50.813—

    Crohn's disease of both small and large intestine with fistula

  • K50.814—

    Crohn's disease of both small and large intestine with abscess

  • K50.818—

    Crohn's disease of both small and large intestine with other complication

  • K50.819—

    Crohn's disease of both small and large intestine with unspecified complications

  • K50.9—

    Crohn's disease, unspecified

  • K50.90—

    Crohn's disease, unspecified, without complications

  • K50.91—

    Crohn's disease, unspecified, with complications

  • K50.911—

    Crohn's disease, unspecified, with rectal bleeding

  • K50.912—

    Crohn's disease, unspecified, with intestinal obstruction

  • K50.913—

    Crohn's disease, unspecified, with fistula

  • K50.914—

    Crohn's disease, unspecified, with abscess

  • K50.918—

    Crohn's disease, unspecified, with other complication

  • K50.919—

    Crohn's disease, unspecified, with unspecified complications

  • K51—

    Ulcerative colitis

  • K51.0—

    Ulcerative (chronic) pancolitis

  • K51.00—

    Ulcerative (chronic) pancolitis without complications

  • K51.01—

    Ulcerative (chronic) pancolitis with complications

  • K51.011—

    Ulcerative (chronic) pancolitis with rectal bleeding

  • K51.012—

    Ulcerative (chronic) pancolitis with intestinal obstruction

  • K51.013—

    Ulcerative (chronic) pancolitis with fistula

  • K51.014—

    Ulcerative (chronic) pancolitis with abscess

  • K51.018—

    Ulcerative (chronic) pancolitis with other complication

  • K51.019—

    Ulcerative (chronic) pancolitis with unspecified complications

  • K51.2—

    Ulcerative (chronic) proctitis

  • K51.20—

    Ulcerative (chronic) proctitis without complications

  • K51.21—

    Ulcerative (chronic) proctitis with complications

  • K51.211—

    Ulcerative (chronic) proctitis with rectal bleeding

  • K51.212—

    Ulcerative (chronic) proctitis with intestinal obstruction

  • K51.213—

    Ulcerative (chronic) proctitis with fistula

  • K51.214—

    Ulcerative (chronic) proctitis with abscess

  • K51.218—

    Ulcerative (chronic) proctitis with other complication

  • K51.219—

    Ulcerative (chronic) proctitis with unspecified complications

  • K51.3—

    Ulcerative (chronic) rectosigmoiditis

  • K51.30—

    Ulcerative (chronic) rectosigmoiditis without complications

  • K51.31—

    Ulcerative (chronic) rectosigmoiditis with complications

  • K51.311—

    Ulcerative (chronic) rectosigmoiditis with rectal bleeding

  • K51.312—

    Ulcerative (chronic) rectosigmoiditis with intestinal obstruction

  • K51.313—

    Ulcerative (chronic) rectosigmoiditis with fistula

  • K51.314—

    Ulcerative (chronic) rectosigmoiditis with abscess

  • K51.318—

    Ulcerative (chronic) rectosigmoiditis with other complication

  • K51.319—

    Ulcerative (chronic) rectosigmoiditis with unspecified complications

  • K51.4—

    Inflammatory polyps of colon

  • K51.40—

    Inflammatory polyps of colon without complications

  • K51.41—

    Inflammatory polyps of colon with complications

  • K51.411—

    Inflammatory polyps of colon with rectal bleeding

  • K51.412—

    Inflammatory polyps of colon with intestinal obstruction

  • K51.413—

    Inflammatory polyps of colon with fistula

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