Includes:

  • noninfective inflammatory bowel disease

Excludes1

  • irritable bowel syndrome (K58.-)
  • megacolon (K59.3-)
  1. K50 Crohn's disease [regional enteritis]

    Use additional code to identify manifestations, such as:
    pyoderma gangrenosum (L88)

    Includes:

    • granulomatous enteritis

    Excludes1

    • ulcerative colitis (K51.-)
    1. K50.0 Crohn's disease of small intestine

      Inclusion term(s):

      • Crohn's disease [regional enteritis] of duodenum
      • Crohn's disease [regional enteritis] of ileum
      • Crohn's disease [regional enteritis] of jejunum
      • Regional ileitis
      • Terminal ileitis
      1. K50.00 Crohn's disease of small intestine without complications

      2. 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
    2. K50.1 Crohn's disease of large intestine

      Inclusion term(s):

      • Crohn's disease [regional enteritis] of colon
      • Crohn's disease [regional enteritis] of large bowel
      • Crohn's disease [regional enteritis] of rectum
      • Granulomatous colitis
      • Regional colitis
      1. K50.10 Crohn's disease of large intestine without complications

      2. 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
    3. K50.8 Crohn's disease of both small and large intestine

      1. K50.80 Crohn's disease of both small and large intestine without complications

      2. 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
    4. K50.9 Crohn's disease, unspecified

      1. K50.90 Crohn's disease, unspecified, without complications

        Inclusion term(s):

        • Crohn's disease NOS
        • Regional enteritis NOS
      2. 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
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.