| Z18 | Retained foreign body fragments |
| Z18.0 | Retained radioactive fragments |
| Z18.01 | Retained depleted uranium fragments |
| Z18.09 | Other retained radioactive fragments |
| Z18.1 | Retained metal fragments |
| Z18.10 | Retained metal fragments, unspecified |
| Z18.11 | Retained magnetic metal fragments |
| Z18.12 | Retained nonmagnetic metal fragments |
| Z18.2 | Retained plastic fragments |
| Z18.3 | Retained organic fragments |
| Z18.31 | Retained animal quills or spines |
| Z18.32 | Retained tooth |
| Z18.33 | Retained wood fragments |
| Z18.39 | Other retained organic fragments |
| Z18.8 | Other specified retained foreign body |
| Z18.81 | Retained glass fragments |
| Z18.83 | Retained stone or crystalline fragments |
| Z18.89 | Other specified retained foreign body fragments |
| Z18.9 | Retained foreign body fragments, unspecified material |