C24Header code — not billable

Malignant neoplasm of other and unspecified parts of biliary tract

Short description: Malignant neoplasm of other and unsp parts of biliary tract

Chapter
2. Neoplasms
Category
C24
Effective date
October 1, 2026

Related codes in category C24

C24.0Malignant neoplasm of extrahepatic bile ductYesC24.1Malignant neoplasm of ampulla of VaterYesC24.8Malignant neoplasm of overlapping sites of biliary tractYesC24.9Malignant neoplasm of biliary tract, unspecifiedYes

Frequently asked questions

What is ICD-10 code C24?

C24 is an ICD-10-CM diagnosis code for Malignant neoplasm of other and unspecified parts of biliary tract.

Is C24 a billable code?

No. C24 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is C24 in?

C24 falls under Chapter 2: Neoplasms.

When did C24 become effective?

C24 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C24?

C24 belongs to category C24, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.