ICD-11 classes
13 Diseases of the digestive system
Diseases of the stomach or the duodenum
Diseases of stomach
DA42 — Gastritis

ICD-11 DA42 — Gastritis

Gastritis is an injury of gastric mucosa involves epithelial damage, mucosal inflammation, and epithelial cell regeneration except any epithelial defect. Gastritis is caused by various factors such as infectious agents, drugs, chemical agents, autoimmune reaction and the others. Gastritis is diagnosed by histopathologically and/or endoscopically. Gastritis is classified as acute and chronic phase by clinical course.

The diagnosis excludes nothing.

Diagnosis with code DA42 contains 12 clarifying diagnoses:

1. DA42.0 — Autoimmune gastritis
2. DA42.1 — Helicobacter pylori induced gastritis
3. DA42.2 — Eosinophilic gastritis
   It contains 1 clarifying diagnosis.
4. DA42.3 — Lymphocytic gastritis
5. DA42.4 — Allergic gastritis
   It contains 4 clarifying diagnoses.
6. DA42.5 — Gastritis due to duodenogastric reflux
7. DA42.6 — Menetrier disease
8. DA42.7 — Gastritis of unknown aetiology with specific endoscopic or pathological features
   It contains 8 clarifying diagnoses.
9. DA42.8 — Gastritis due to external causes
   It contains 5 clarifying diagnoses.
10. DA42.9 — Gastric phlegmon
11. DA42.Y — Other specified gastritis
12. DA42.Z — Gastritis, unspecified