ICD-11 classes
13 Diseases of the digestive system
Functional gastrointestinal disorders
DD91 — Irritable bowel syndrome or certain specified functional...
DD91.0 — Irritable bowel syndrome

ICD-11 DD91.0 — Irritable bowel syndrome

Irritable bowel syndrome (IBS) is a functional bowel disorder in which abdominal pain or discomfort is associated with defecation or a change in bowel habit, and with features of disordered defecation.

The diagnosis excludes nothing.

Diagnosis with code DD91.0 contains 5 clarifying diagnoses:

1. DD91.00 — Irritable bowel syndrome, constipation predominant
2. DD91.01 — Irritable bowel syndrome, diarrhoea predominant
3. DD91.02 — Irritable bowel syndrome, mixed type
4. DD91.03 — Irritable bowel syndrome, unsubtyped
5. DD91.0Z — Irritable bowel syndrome, type unspecified

The diagnosis is coded elsewhere:

• Chronic primary visceral pain #25101
• Irritable bowel syndrome #25104