K59Other functional intestinal disorders
ICD-10-CM category (non-billable header) code — part of Other diseases of intestines (K55-K64)
Coding Notes
Excludes1 (never code both together)
- change in bowel habit NOS (R19.4)
- intestinal malabsorption (K90.-)
- psychogenic intestinal disorders (F45.8)
Excludes2 (not part of this condition — may code both)
- functional disorders of stomach (K31.-)
Subcategories (7)
- K59.0 Constipation
- K59.1 Functional diarrhea
- K59.2 Neurogenic bowel, not elsewhere classified
- K59.3 Megacolon, not elsewhere classified
- K59.4 Anal spasm
- K59.8 Other specified functional intestinal disorders
- K59.9 Functional intestinal disorder, unspecified