ICD-11 classes
13 Diseases of the digestive system
Diseases of the stomach or the duodenum
Ulcer of stomach or duodenum
DA63 — Duodenal ulcer
DA63.1 — Helicobacter-pylori associated duodenal ulcer

ICD-11 DA63.1 — Helicobacter-pylori associated duodenal ulcer

Helicobacter pylori (H. pylori) is a gram-negative bacillus that is found in the mucous layer overlying gastric epithelium, within epithelial cells and attached to mucous cells, leading to inflammation. In the case of duodenal ulcers, H. pylori is believed to infect the gastric antrum or ectopic gastric mucosa in the duodenum. This is associated with increased acid production and duodenal ulceration.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.

The diagnosis is coded elsewhere:

• Duodenal ulcer #13770