C24.0 — Malignant neoplasm of extrahepatic bile duct
C24.0 is a billable, specific ICD-10-CM code for malignant neoplasm of extrahepatic bile duct. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Malignant neoplasm of biliary duct or passage NOS
- Malignant neoplasm of common bile duct
- Malignant neoplasm of cystic duct
- Malignant neoplasm of hepatic duct
Other codes that can never be billed with C24.0
These codes carry an Excludes1 note pointing at C24.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C24.0 alone.
- C22.1Intrahepatic bile duct carcinoma
Risk adjustment
C24.0 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 20 Lung and Other Severe Cancers1.136 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
C24.0 is named in 62 Medicare coverage policies — 62 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
- A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
How C24.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C24.0.
- Klatskin's tumor
- Tumor›Klatskin's
Related codes at this level
Codes that share C24. If C24.0 is not quite right, the correct code is usually one of these.
Questions about C24.0
- Is C24.0 a billable ICD-10-CM code?
- Yes. C24.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C24.0 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).