C24 — Malignant neoplasm of other and unspecified parts of biliary tract
Is C24 billable?
No — C24 is a non-billable header code. C24 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 4 billable codes beneath C24.
C24 at a glance
| Code | C24 |
|---|---|
| Description | Malignant neoplasm of other and unspecified parts of biliary tract |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with C24 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- malignant neoplasm of intrahepatic bile duct (C22.1)
Excludes1 — never code together — inherited from C15-C26
The conditions below can never be reported together with C24 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- Kaposi's sarcoma of gastrointestinal sites (C46.4)
Excludes2 — not included here — inherited from C15-C26
The conditions below are not part of C24, but a patient may have both at the same time. When documentation supports it, C24 and the excluded code may both be reported.
- gastrointestinal stromal tumors (C49.A-)
What codes fall under C24? (4)
How long has C24 existed?
C24 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with C24?
ICD-10-CM declares these codes mutually exclusive with C24 — exactly one of each pair can be correct for a given encounter.