1. K59 Other functional intestinal disorders

    1. K59.0 Constipation

      1. K59.00 Constipation, unspecified

      2. K59.01 Slow transit constipation

      3. K59.02 Outlet dysfunction constipation

      4. K59.03 Drug induced constipation

      5. K59.04 Chronic idiopathic constipation

        Inclusion term(s):

        • Functional constipation
      6. K59.09 Other constipation

        Inclusion term(s):

        • Chronic constipation
    2. K59.1 Functional diarrhea

    3. K59.2 Neurogenic bowel, not elsewhere classified

    4. K59.3 Megacolon, not elsewhere classified

      Inclusion term(s):

      • Dilatation of colon
      1. K59.31 Toxic megacolon

      2. K59.39 Other megacolon

        Inclusion term(s):

        • Megacolon NOS
    5. K59.4 Anal spasm

      Inclusion term(s):

      • Proctalgia fugax
    6. K59.8 Other specified functional intestinal disorders

      1. K59.81 Ogilvie syndrome

        Inclusion term(s):

        • Acute colonic pseudo-obstruction (ACPO)
      2. K59.89 Other specified functional intestinal disorders

        Inclusion term(s):

        • Atony of colon
        • Pseudo-obstruction (acute) (chronic) of intestine
    7. K59.9 Functional intestinal disorder, unspecified

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.