K20-K31
Diseases of esophagus, stomach and duodenum
- K20
Esophagitis
- K21
Gastro-esophageal reflux disease
- K22
Other diseases of esophagus
- K23
Disorders of esophagus in diseases classified elsewhere
- K25
Gastric ulcer
- K26
Duodenal ulcer
- K27
Peptic ulcer, site unspecified
- K28
Gastrojejunal ulcer
- K29
Gastritis and duodenitis
- K30
Functional dyspepsia
- K31
Other diseases of stomach and duodenum