C24.0 (Malignant neoplasm of extrahepatic bile duct) compared with D13.5 (Benign neoplasm of extrahepatic bile ducts), from the official CMS tabular data. C24.0 and D13.5 name the same anatomical site (bile or biliary) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (bile or biliary)
The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.
Source: CMS Table of Neoplasms
Same site, different neoplasm behavior. C24.0 and D13.5 name the same anatomical site (bile or biliary) with a different neoplasm behavior.
From the CMS Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.
| C24.0Malignant neoplasm of extrahepatic bile duct | D13.5Benign neoplasm of extrahepatic bile ducts | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of extrahepatic bile duct is a billable ICD-10-CM diagnosis code (C24.0). | Benign neoplasm of extrahepatic bile ducts is a billable ICD-10-CM diagnosis code (D13.5). |
| Includes | Malignant neoplasm of biliary duct or passage NOS Malignant neoplasm of common bile duct Malignant neoplasm of cystic duct Malignant neoplasm of hepatic duct | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources