| Code | Description |
| C18.1 | Malignant neoplasm of appendix |
| C7A.020 | Malignant carcinoid tumor of the appendix |
| D12.1 | Benign neoplasm of appendix |
| D37.3 | Neoplasm of uncertain behavior of appendix |
| D3A.020 | Benign carcinoid tumor of the appendix |
| K38.0 | Hyperplasia of appendix |
| K38.2 | Diverticulum of appendix |
| K38.3 | Fistula of appendix |
| K38.8 | Other specified diseases of appendix |
| K38.9 | Disease of appendix, unspecified |
| N44.03 | Torsion of appendix testis |
| N44.04 | Torsion of appendix epididymis |