ICD-10-CM Book 2024 Edition

Chapters  /  Chapter 11  /  K55-K64  /  K59
K59 Other functional intestinal disorders
Excludes1 change in bowel habit NOS (R19.4)
intestinal malabsorption (K90.-)
psychogenic intestinal disorders (F45.8)
Excludes2 functional disorders of stomach (K31.-)
K59.0 Constipation
Excludes1 fecal impaction (K56.41)
Excludes2 incomplete defecation (R15.0)
K59.00 Constipation, unspecified
K59.01 Slow transit constipation
K59.02 Outlet dysfunction constipation
K59.03 Drug induced constipation
UseAdditionalCode code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
K59.04 Chronic idiopathic constipation
Functional constipation
K59.09 Other constipation
Chronic constipation
K59.1 Functional diarrhea
Excludes1 diarrhea NOS (R19.7)
irritable bowel syndrome with diarrhea (K58.0)
K59.2 Neurogenic bowel, not elsewhere classified
K59.3 Megacolon, not elsewhere classified
Dilatation of colon
CodeFirst , if applicable (T51-T65) to identify toxic agent
Excludes1 congenital megacolon (aganglionic) (Q43.1)
megacolon (due to) (in) Chagas' disease (B57.32)
megacolon (due to) (in) Clostridium difficile (A04.7-)
megacolon (due to) (in) Hirschsprung's disease (Q43.1)
K59.31 Toxic megacolon
K59.39 Other megacolon
Megacolon NOS
K59.4 Anal spasm
Proctalgia fugax
K59.8 Other specified functional intestinal disorders
K59.81 Ogilvie syndrome
Acute colonic pseudo-obstruction (ACPO)
K59.89 Other specified functional intestinal disorders
Atony of colon
Pseudo-obstruction (acute) (chronic) of intestine
K59.9 Functional intestinal disorder, unspecified