C24: Malignant neoplasm of other and unspecified parts of biliary tract
Codes under C24 (Malignant neoplasm of other and unspecified parts of biliary tract). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| C24.0 | Malignant neoplasm of extrahepatic bile duct | ✓ |
| C24.0 | Malignant neoplasm of extrahepatic bile duct | ✓ |
| C24.1 | Malignant neoplasm of ampulla of Vater | ✓ |
| C24.1 | Malignant neoplasm of ampulla of Vater | ✓ |
| C24.8 | Malignant neoplasm of overlapping sites of biliary tract | ✓ |
| C24.8 | Malignant neoplasm of overlapping sites of biliary tract | ✓ |
| C24.9 | Malignant neoplasm of biliary tract, unspecified | ✓ |
| C24.9 | Malignant neoplasm of biliary tract, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code C24?
C24 is an ICD-10-CM category covering Malignant neoplasm of other and unspecified parts of biliary tract. It contains 8 more specific diagnosis codes, 8 of which are billable.
Is C24 a billable code?
No — C24 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 C24.0 — Malignant neoplasm of extrahepatic bile duct). 8 of the 8 codes under C24 are billable.
What codes fall under C24?
C24 includes C24.0, C24.0, C24.1, C24.1, C24.8, plus 3 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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