DA96.00

ICD-11 MMS 2026-01

Bacterial overgrowth syndrome

Description

Small intestinal bacterial overgrowth syndrome is a term that describes clinical manifestations that occur when poor movement of intestinal contents allows certain normal intestinal bacteria to grow excessively, causing diarrhoea and poor absorption of nutrients (malabsorption). Various etiological processes can disrupt mechanisms that keep the number of these bacteria low. These include structural abnormalities (congenital or surgical) and disorders that cause decreased gastric acidity, reduced peristaltic activity, and mucosal damage or atrophy.

Index terms

  • Bacterial overgrowth syndrome
  • BOS – [bacterial overgrowth syndrome]
  • SIBO - [small intestine bacterial overgrowth]
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  • small intestine bacterial overgrowth syndrome
  • Blind loop syndrome
  • Contaminated small bowel syndrome
  • Lane syndrome
  • Stagnant loop syndrome

Exclusions from above levels

  • DD70 – Crohn disease
  • DE12.0 – Ileostomy malfunction
  • http://id.who.int/icd/entity/1195691020 – Diseases of duodenum
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  • 01 – Certain infectious or parasitic diseases
  • 02 – Neoplasms
  • 05 – Endocrine, nutritional or metabolic diseases
  • 06 – Mental, behavioural or neurodevelopmental disorders
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • DA96.01 – Tropical sprue
  • DA96.02 – Malabsorption or intolerance of specific nutrients
  • DA96.04 – Short bowel syndrome
  • DA96.05 – Intestinal failure
  • DA96.0Y – Other specified intestinal malabsorption
  • DA96.0Z – Intestinal malabsorption, unspecified

Foundation entity

Bacterial overgrowth syndrome – http://id.who.int/icd/entity/449241496

Allowed postcoordination axes

Part of: DA96.0: Intestinal malabsorption › DA96: Intestinal malabsorption or protein-losing enteropathy › 13: Diseases of the digestive system