13Diseases of the digestive system
Functional gastrointestinal disorders
DD91Irritable bowel syndrome or certain specified functional bowel disorders
DD91.1
category
Functional constipation
Definition Functional constipation is a functional bowel disorder that presents as persistently difficult, infrequent, or seemingly incomplete defecation, which do not meet IBS criteria.
Also indexed as
Atonic constipation Functional constipation functional constipation with slow transit neurogenic constipation spastic constipation
Nearby in Irritable bowel syndrome or certain specified functional bowel disorders
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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