2019 ICD-10-CM Diagnosis Code K50

Crohn's disease [regional enteritis]

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • K50 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM K50 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of K50 - other international versions of ICD-10 K50 may differ.
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code to identify manifestations, such as:
  • pyoderma gangrenosum (
    ICD-10-CM Diagnosis Code L88

    Pyoderma gangrenosum

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Phagedenic pyoderma
    Type 1 Excludes
    • dermatitis gangrenosa (L08.0)
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K50. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • ulcerative colitis (
    ICD-10-CM Diagnosis Code K51
    • K51 Ulcerative colitis
      • K51.0 Ulcerative (chronic) pancolitis
        • K51.00 Ulcerative (chronic) pancolitis without compl...
        • K51.01 Ulcerative (chronic) pancolitis with complica...
          • K51.011 Ulcerative (chronic) pancolitis with rectal b...
          • K51.012 Ulcerative (chronic) pancolitis with intestin...
          • K51.013 Ulcerative (chronic) pancolitis with fistula
          • K51.014 Ulcerative (chronic) pancolitis with abscess
          • K51.018 Ulcerative (chronic) pancolitis with other co...
          • K51.019 Ulcerative (chronic) pancolitis with unspecif...
      • K51.2 Ulcerative (chronic) proctitis
        • K51.20 Ulcerative (chronic) proctitis without compli...
        • K51.21 Ulcerative (chronic) proctitis with complicat...
          • K51.211 Ulcerative (chronic) proctitis with rectal bl...
          • K51.212 Ulcerative (chronic) proctitis with intestina...
          • K51.213 Ulcerative (chronic) proctitis with fistula
          • K51.214 Ulcerative (chronic) proctitis with abscess
          • K51.218 Ulcerative (chronic) proctitis with other com...
          • K51.219 Ulcerative (chronic) proctitis with unspecifi...
      • K51.3 Ulcerative (chronic) rectosigmoiditis
        • K51.30 Ulcerative (chronic) rectosigmoiditis without...
        • K51.31 Ulcerative (chronic) rectosigmoiditis with co...
          • K51.311 Ulcerative (chronic) rectosigmoiditis with re...
          • K51.312 Ulcerative (chronic) rectosigmoiditis with in...
          • K51.313 Ulcerative (chronic) rectosigmoiditis with fi...
          • K51.314 Ulcerative (chronic) rectosigmoiditis with ab...
          • K51.318 Ulcerative (chronic) rectosigmoiditis with ot...
          • K51.319 Ulcerative (chronic) rectosigmoiditis with un...
      • K51.4 Inflammatory polyps of colon
        • K51.40 Inflammatory polyps of colon without complica...
        • K51.41 Inflammatory polyps of colon with complicatio...
          • K51.411 Inflammatory polyps of colon with rectal blee...
          • K51.412 Inflammatory polyps of colon with intestinal ...
          • K51.413 Inflammatory polyps of colon with fistula
          • K51.414 Inflammatory polyps of colon with abscess
          • K51.418 Inflammatory polyps of colon with other compl...
          • K51.419 Inflammatory polyps of colon with unspecified...
      • K51.5 Left sided colitis
        • K51.50 …… without complications
        • K51.51 Left sided colitis with complications
          • K51.511 Left sided colitis with rectal bleeding
          • K51.512 Left sided colitis with intestinal obstructio...
          • K51.513 Left sided colitis with fistula
          • K51.514 Left sided colitis with abscess
          • K51.518 Left sided colitis with other complication
          • K51.519 Left sided colitis with unspecified complicat...
      • K51.8 Other ulcerative colitis
        • K51.80 Other ulcerative colitis without complication...
        • K51.81 Other ulcerative colitis with complications
          • K51.811 Other ulcerative colitis with rectal bleeding...
          • K51.812 Other ulcerative colitis with intestinal obst...
          • K51.813 Other ulcerative colitis with fistula
          • K51.814 Other ulcerative colitis with abscess
          • K51.818 Other ulcerative colitis with other complicat...
          • K51.819 Other ulcerative colitis with unspecified com...
      • K51.9 Ulcerative colitis, unspecified
        • K51.90 Ulcerative colitis, unspecified, without comp...
        • K51.91 Ulcerative colitis, unspecified, with complic...
          • K51.911 Ulcerative colitis, unspecified with rectal b...
          • K51.912 Ulcerative colitis, unspecified with intestin...
          • K51.913 Ulcerative colitis, unspecified with fistula
          • K51.914 Ulcerative colitis, unspecified with abscess
          • K51.918 Ulcerative colitis, unspecified with other co...
          • K51.919 Ulcerative colitis, unspecified with unspecif...
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • granulomatous enteritis
The following code(s) above K50 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K50:
  • K00-K95
    2019 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • 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)
    Diseases of the digestive system
  • K50-K52
    2019 ICD-10-CM Range K50-K52

    Noninfective enteritis and colitis

    • noninfective inflammatory bowel disease
    Type 1 Excludes
    Noninfective enteritis and colitis
Clinical Information
  • A chronic transmural inflammation that may involve any part of the digestive tract from mouth to anus, mostly found in the ileum, the cecum, and the colon. In crohn disease, the inflammation, extending through the intestinal wall from the mucosa to the serosa, is characteristically asymmetric and segmental. Epithelioid granulomas may be seen in some patients.
  • A condition in which the gastrointestinal tract is inflamed over a long period of time. Crohn disease usually affects the small intestine and colon. Symptoms include fever, diarrhea, stomach cramps, vomiting, and weight loss. Crohn disease increases the risk of colorectal cancer and small intestine cancer. It is a type of inflammatory bowel disease (ibd).
  • A gastrointestinal disorder characterized by chronic inflammation involving all layers of the intestinal wall, noncaseating granulomas affecting the intestinal wall and regional lymph nodes, and transmural fibrosis. Crohn disease most commonly involves the terminal ileum; the colon is the second most common site of involvement.
  • Crohn's disease causes inflammation of the digestive system. It is one of a group of diseases called inflammatory bowel disease. The disease can affect any area from the mouth to the anus. It often affects the lower part of the small intestine called the ileum. Crohn's disease seems to run in some families. It can occur in people of all age groups but is most often diagnosed in young adults. Common symptoms are pain in the abdomen and diarrhea. Bleeding from the rectum, weight loss, joint pain, skin problems and fever may also occur. Children with the disease may have growth problems. Other problems can include intestinal blockage and malnutrition.treatment may include medicines, nutrition supplements, surgery or a combination of these options. Some people have long periods of remission, when they are free of symptoms.
  • Gastrointestinal disorder characterized by chronic inflammatory infiltrates, fibrosis affecting all layers of the serosa, and development of noncaseating granulomas; most common site of involvement is the terminal ileum with the colon as the second most common.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
Code annotations containing back-references to K50:
  • Code Also: M07
    , M08
    ICD-10-CM Diagnosis Code M07

    Enteropathic arthropathies

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Code Also
    • associated enteropathy, such as:
    • regional enteritis [Crohn's disease] (K50.-)
    • ulcerative colitis (K51.-)
    Type 1 Excludes
    • psoriatic arthropathies (L40.5-)
    ICD-10-CM Diagnosis Code M08

    Juvenile arthritis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Code Also
    • any associated underlying condition, such as:
    • regional enteritis [Crohn's disease] (K50.-)
    • ulcerative colitis (K51.-)
    Type 1 Excludes
    • arthropathy in Whipple's disease (M14.8)
    • Felty's syndrome (M05.0)
    • juvenile dermatomyositis (M33.0-)
    • psoriatic juvenile arthropathy (L40.54)
  • Type 1 Excludes: K51
    , E55.0
    ICD-10-CM Diagnosis Code K51

    Ulcerative colitis

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • Crohn's disease [regional enteritis] (K50.-)
    Use Additional
    • code to identify manifestations, such as:
    • pyoderma gangrenosum (L88)
    ICD-10-CM Diagnosis Code E55.0

    Rickets, active

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Infantile osteomalacia
    • Juvenile osteomalacia
    Type 1 Excludes
    • celiac rickets (K90.0)
    • Crohn's rickets (K50.-)
    • hereditary vitamin D-dependent rickets (E83.32)
    • inactive rickets (E64.3)
    • renal rickets (N25.0)
    • sequelae of rickets (E64.3)
    • vitamin D-resistant rickets (E83.31)
  • Type 2 Excludes: M04
    ICD-10-CM Diagnosis Code M04

    Autoinflammatory syndromes

      2017 - New Code 2018 2019 Non-Billable/Non-Specific Code
    Type 2 Excludes
ICD-10-CM Codes Adjacent To K50
K44.1 Diaphragmatic hernia with gangrene
K44.9 Diaphragmatic hernia without obstruction or gangrene
K45 Other abdominal hernia
K45.0 Other specified abdominal hernia with obstruction, without gangrene
K45.1 Other specified abdominal hernia with gangrene
K45.8 Other specified abdominal hernia without obstruction or gangrene
K46 Unspecified abdominal hernia
K46.0 Unspecified abdominal hernia with obstruction, without gangrene
K46.1 Unspecified abdominal hernia with gangrene
K46.9 Unspecified abdominal hernia without obstruction or gangrene
K50 Crohn's disease [regional enteritis]
K50.0 Crohn's disease of small intestine
K50.00 …… without complications
K50.01 Crohn's disease of small intestine with complications
K50.011 Crohn's disease of small intestine with rectal bleeding
K50.012 Crohn's disease of small intestine with intestinal obstruction
K50.013 Crohn's disease of small intestine with fistula
K50.014 Crohn's disease of small intestine with abscess
K50.018 Crohn's disease of small intestine with other complication
K50.019 Crohn's disease of small intestine with unspecified complications
K50.1 Crohn's disease of large intestine

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.