C24.8
BillableMalignant neoplasm of overlapping sites of biliary tract
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 9 — Lung and Other Severe Cancers
0.973ESRDHCC 9 — Lung and Other Severe Cancers
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer involving multiple overlapping sites within the biliary tract system, including bile ducts and related structures.
Coding Tips
- •Use this code when the tumor involves more than one distinct site of the biliary tract
- •Document all involved sites clearly in the medical record to support the overlapping sites designation
Clinical Significance
Overlapping sites of the biliary tract indicates a malignant tumor spanning multiple structures within the biliary system (gallbladder, cystic duct, common bile duct, hepatic ducts, ampulla). This code reflects more extensive disease that often indicates advanced cancer with involvement of multiple biliary structures. These patients typically have limited surgical options and may require palliative stenting or bypass procedures for biliary obstruction.
Documentation Requirements
- ✓Documentation confirming involvement of two or more distinct biliary tract structures
- ✓Identification of the specific structures involved
- ✓Histological type
- ✓Stage of disease and extent of biliary involvement
- ✓Assessment of resectability
Commonly Confused Codes
C24.9 — Biliary tract, unspecified: C24.8 is for known multi-site involvement; C24.9 is for unknown locationC24.0 — Extrahepatic bile duct: use when tumor is confined to the extrahepatic ductsC23 — Gallbladder: use when tumor is confined to the gallbladderC22.1 — Intrahepatic bile duct: if the tumor extends from extrahepatic into intrahepatic ducts, the overlapping code may apply
Code Hierarchy
└C24Malignant neoplasm of other and unspecified parts of biliary tract└C24.8Malignant neoplasm of overlapping sites of biliary tract
└C24.8Malignant neoplasm of overlapping sites of biliary tract