Table 3.
Disease Staging© (Thomson Reuters) classification system used to identify principal discharge diagnoses
| Discharge category | Description |
| GIS03, GIS04, GIS18 | Benign anal-rectal disorders |
| GIS05 | Appendicitis |
| GIS09 or GIS37 | Inflammatory bowel disease |
| GIS10 | Diverticular disease |
| GIS17 or GIS84 | Gastroduodenitis |
| GIS19 | Hernia |
| GIS20 | Esophagitis |
| GIS25-30, HEP11, GIS82-83 | Upper gastrointestinal cancers |
| GIS31 | Gastroduodenal ulcer |
| HEP01 or HEP 84 | Gallstone related disorders |
| HEP12 or HEP85 | Non-malignant pancreatitis |
| HEP81 or HEP82 | Hepatobiliary malignancies |