C24.0 — Malignant neoplasm of extrahepatic bile duct
Is C24.0 billable?
Yes — C24.0 is billable for FY2027. C24.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C24.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
C24.0 at a glance
| Code | C24.0 |
|---|---|
| Description | Malignant neoplasm of extrahepatic bile duct |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does C24.0 group to?
C24.0 sits in MDC 07 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 435Malignancy of Hepatobiliary System or Pancreas with MCCmedical
- 436Malignancy of Hepatobiliary System or Pancreas with CCmedical
- 437Malignancy of Hepatobiliary System or Pancreas without CC/MCCmedical
As a secondary diagnosis, C24.0 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is C24.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to C24.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Klatskin's tumor
- Tumor › Klatskin's
Inclusion terms
Alternative wording in documentation that is classified to C24.0.
- Malignant neoplasm of biliary duct or passage NOS
- Malignant neoplasm of common bile duct
- Malignant neoplasm of cystic duct
- Malignant neoplasm of hepatic duct
Excludes1 — never code together — inherited from C15-C26
The conditions below can never be reported together with C24.0 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)
Excludes1 — never code together — inherited from C24
The conditions below can never be reported together with C24.0 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)
Excludes2 — not included here — inherited from C15-C26
The conditions below are not part of C24.0, but a patient may have both at the same time. When documentation supports it, C24.0 and the excluded code may both be reported.
- gastrointestinal stromal tumors (C49.A-)
How long has C24.0 existed?
C24.0 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 C24.0?
ICD-10-CM declares these codes mutually exclusive with C24.0 — exactly one of each pair can be correct for a given encounter.