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  3. K00–K95
  4. K50-K52
  5. Crohn's disease [regional enteritis] (K50)

Crohn's disease [regional enteritis] (K50)

ICD-10 codes K50 and its subcategories classify Crohn's disease, also known as regional enteritis, which is an inflammatory condition affecting the gastrointestinal tract. These specific codes identify whether Crohn's disease involves the small intestine, large intestine, both, or is unspecified, and whether complications are present.

The range of codes from K50.0 to K50.9 allows precise documentation for Crohn's disease, indicating location and associated issues such as intestinal obstruction, fistula, abscesses, and rectal bleeding. Commonly used synonyms like ileocecal Crohn disease, terminal ileitis, jejunitis, colorectal Crohn disease, perianal Crohn's disease, and regional ileocolitis correspond to subcodes describing disease activity in specific intestinal segments. Coding also differentiates between cases with or without complications, including less common manifestations such as skin involvement or arthritis. Using these codes helps clearly communicate the extent and severity of the disease for clinical, billing, and research purposes, supporting accurate diagnosis and treatment planning.

  • Diseases of the digestive system (K00–K95)

    • Noninfective enteritis and colitis (K50-K52)

        • Crohn's disease [regional enteritis] (K50)

        • K50 Crohn's disease [regional enteritis]
        • K50.0 Crohn's disease of small intestine
        • K50.00 Crohn's disease of small intestine 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
        • K50.10 Crohn's disease of large intestine without complications
        • K50.11 Crohn's disease of large intestine with complications
        • K50.111 Crohn's disease of large intestine with rectal bleeding
        • K50.112 Crohn's disease of large intestine with intestinal obstruction
        • K50.113 Crohn's disease of large intestine with fistula
        • K50.114 Crohn's disease of large intestine with abscess
        • K50.118 Crohn's disease of large intestine with other complication
        • K50.119 Crohn's disease of large intestine with unspecified complications
        • K50.8 Crohn's disease of both small and large intestine
        • K50.80 Crohn's disease of both small and large intestine without complications
        • 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

Instructional Notations

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

  • granulomatous enteritis

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

  • code to identify any associated fistulas, if applicable:
  • anal fistula K60.3
  • anorectal fistula K60.5
  • rectal fistula K60.4

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • ulcerative colitis K51

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Proctocolitis

Inflammation of the RECTUM and the distal portion of the COLON.