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
PrevNext
  • K63.1—

    Perforation of intestine (nontraumatic)

  • K63.2—

    Fistula of intestine

  • K63.3—

    Ulcer of intestine

  • K63.4—

    Enteroptosis

  • K63.5—

    Polyp of colon

  • K63.81—

    Dieulafoy lesion of intestine

  • K63.8211—

    Small intestinal bacterial overgrowth, hydrogen-subtype

  • K63.8212—

    Small intestinal bacterial overgrowth, hydrogen sulfide-subtype

  • K63.8219—

    Small intestinal bacterial overgrowth, unspecified

  • K63.822—

    Small intestinal fungal overgrowth

  • K63.829—

    Intestinal methanogen overgrowth, unspecified

  • K63.89—

    Other specified diseases of intestine

  • K63.9—

    Disease of intestine, unspecified

  • K64.0—

    First degree hemorrhoids

  • K64.1—

    Second degree hemorrhoids

  • K64.2—

    Third degree hemorrhoids

  • K64.3—

    Fourth degree hemorrhoids

  • K64.4—

    Residual hemorrhoidal skin tags

  • K64.5—

    Perianal venous thrombosis

  • K64.8—

    Other hemorrhoids

  • K64.9—

    Unspecified hemorrhoids

  • K65.0—

    Generalized (acute) peritonitis

  • K65.1—

    Peritoneal abscess

  • K65.2—

    Spontaneous bacterial peritonitis

  • K65.3—

    Choleperitonitis

  • K65.4—

    Sclerosing mesenteritis

  • K65.8—

    Other peritonitis

  • K65.9—

    Peritonitis, unspecified

  • K66.0—

    Peritoneal adhesions (postprocedural) (postinfection)

  • K66.1—

    Hemoperitoneum

  • K66.8—

    Other specified disorders of peritoneum

  • K66.9—

    Disorder of peritoneum, unspecified

  • K67—

    Disorders of peritoneum in infectious diseases classified elsewhere

  • K68.11—

    Postprocedural retroperitoneal abscess

  • K68.12—

    Psoas muscle abscess

  • K68.19—

    Other retroperitoneal abscess

  • K68.2—

    Retroperitoneal fibrosis

  • K68.3—

    Retroperitoneal hematoma

  • K68.9—

    Other disorders of retroperitoneum

  • K70.0—

    Alcoholic fatty liver

  • K70.10—

    Alcoholic hepatitis without ascites

  • K70.11—

    Alcoholic hepatitis with ascites

  • K70.2—

    Alcoholic fibrosis and sclerosis of liver

  • K70.30—

    Alcoholic cirrhosis of liver without ascites

  • K70.31—

    Alcoholic cirrhosis of liver with ascites

  • K70.40—

    Alcoholic hepatic failure without coma

  • K70.41—

    Alcoholic hepatic failure with coma

  • K70.9—

    Alcoholic liver disease, unspecified

  • K71.0—

    Toxic liver disease with cholestasis

  • K71.10—

    Toxic liver disease with hepatic necrosis, without coma

PreviousPage 13 of 18Next