ICD-11 classes
13 Diseases of the digestive system
Diseases of the stomach or the duodenum
Diseases of duodenum
DA63 — Duodenal ulcer

ICD-11 DA63 — Duodenal ulcer

Duodenal ulcer is defined as a distinct breach in the mucosa of the duodenum as a result of caustic effects of acid and pepsin in the lumen. Histologically, duodenal ulcer is identified as necrosis of the mucosa extending through the muscularis mucosae into the submucosa. In the endoscopic or radiological view, there is an appreciable depth of the lesion. When the break of epithelial lining is confined to the mucosa without penetrating through the muscularis mucosae, the superficial lesion is called ‘erosion’.

The diagnosis includes nothing.

Diagnosis with code DA63 contains 9 clarifying diagnoses:

1. DA63.0 — Duodenal erosion
2. DA63.1 — Helicobacter-pylori associated duodenal ulcer
3. DA63.2 — Helicobacter-pylori associated and drug-induced duodenal ulcer
4. DA63.3 — Stress ulcer of duodenum
5. DA63.4 — Eosinophilic duodenal ulcer
6. DA63.5 — Duodenal ulcer due to external causes
   It contains 5 clarifying diagnoses.
7. DA63.6 — Infectious duodenal ulcer
   It contains 4 clarifying diagnoses.
8. DA63.Y — Other specified duodenal ulcer
9. DA63.Z — Duodenal ulcer, unspecified

The diagnosis is coded elsewhere:

• Ulcer of stomach or duodenum #13790
• Duodenal ulcer #13816