ICD-10-CM Book 2025 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 11 K00-K95 Diseases of the digestive system /
K55-K64 Other diseases of intestines /
K59 Other functional intestinal disorders

  Billable ICD-10-CM Code K59.1
K59.1
Functional diarrhea
excludes1
diarrhea NOS (R19.7)
irritable bowel syndrome with diarrhea (K58.0)