Z18: Retained foreign body fragments
Codes under Z18 (Retained foreign body fragments). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Z18.0 | Retained radioactive fragments | — |
| Z18.0 | Retained radioactive fragments | — |
| Z18.01 | Retained depleted uranium fragments | ✓ |
| Z18.01 | Retained depleted uranium fragments | ✓ |
| Z18.1 | Retained metal fragments | — |
| Z18.1 | Retained metal fragments | — |
| Z18.2 | Retained plastic fragments | ✓ |
| Z18.2 | Retained plastic fragments | ✓ |
| Z18.3 | Retained organic fragments | — |
| Z18.3 | Retained organic fragments | — |
| Z18.8 | Other specified retained foreign body | — |
| Z18.8 | Other specified retained foreign body | — |
| Z18.09 | Other retained radioactive fragments | ✓ |
| Z18.09 | Other retained radioactive fragments | ✓ |
| Z18.9 | Retained foreign body fragments, unspecified material | ✓ |
| Z18.9 | Retained foreign body fragments, unspecified material | ✓ |
| Z18.10 | Retained metal fragments, unspecified | ✓ |
| Z18.10 | Retained metal fragments, unspecified | ✓ |
| Z18.11 | Retained magnetic metal fragments | ✓ |
| Z18.11 | Retained magnetic metal fragments | ✓ |
| Z18.12 | Retained nonmagnetic metal fragments | ✓ |
| Z18.12 | Retained nonmagnetic metal fragments | ✓ |
| Z18.31 | Retained animal quills or spines | ✓ |
| Z18.31 | Retained animal quills or spines | ✓ |
| Z18.32 | Retained tooth | ✓ |
| Z18.32 | Retained tooth | ✓ |
| Z18.33 | Retained wood fragments | ✓ |
| Z18.33 | Retained wood fragments | ✓ |
| Z18.39 | Other retained organic fragments | ✓ |
| Z18.39 | Other retained organic fragments | ✓ |
| Z18.81 | Retained glass fragments | ✓ |
| Z18.81 | Retained glass fragments | ✓ |
| Z18.83 | Retained stone or crystalline fragments | ✓ |
| Z18.83 | Retained stone or crystalline fragments | ✓ |
| Z18.89 | Other specified retained foreign body fragments | ✓ |
| Z18.89 | Other specified retained foreign body fragments | ✓ |
Frequently asked questions
What is ICD-10-CM code Z18?
Z18 is an ICD-10-CM category covering Retained foreign body fragments. It contains 36 more specific diagnosis codes, 28 of which are billable.
Is Z18 a billable code?
No — Z18 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Z18.0 — Retained radioactive fragments). 28 of the 36 codes under Z18 are billable.
What codes fall under Z18?
Z18 includes Z18.0, Z18.0, Z18.01, Z18.01, Z18.1, plus 31 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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