Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerBilling CodesMalignant neoplasms of digestive organsICD-10-CM c24-malignant-neoplasm-biliary-tract
    Ask Trek AI about this page

    ICD-10-CM Code For Malignant Neoplasm Of Other And Unspecified Parts Of Biliary Tract: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group C24 includes malignant neoplasms of other and unspecified parts of the biliary tract, covering tumors of biliary sites not classified in more specific biliary neoplasm codes. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving primary malignant tumors of atypical or unspecified biliary locations, capturing information about tumor site and involvement of adjacent structures. Accurate coding within the ICD-10-CM C24 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

    Customize your policy alerts

    Sign up for ICD-10-CM Code For Malignant Neoplasm Of Other And Unspecified Parts Of Biliary Tract: Group Overview policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    ICD-10-CM C24: Malignant Neoplasm Of Other And Unspecified Parts Of Biliary Tract Overview

    The ICD-10-CM C24 group represents malignant tumors originating in parts of the biliary tract not classified elsewhere, including the cystic duct, ampulla of Vater, and unspecified biliary sites. These diagnoses target the hepatobiliary system and reflect cancers that may affect bile ducts, biliary drainage, and adjacent structures. Accurate coding matters for clinical communication, cancer registries, and appropriate reimbursement based on documented site and extent of disease.

    Table of contents

    Progress1 / 6

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    When to Use

    Use a code from this group when documentation indicates a primary malignant neoplasm of the biliary tract at an unspecified or other site not covered by more specific biliary neoplasm codes. Select the most specific C24 subcode available that matches the documented site, such as cystic duct or ampulla of Vater, when that level of detail is provided.

    ICD-10-CM Codes

    4 rows

    ICD-10-CM CodeDescription
    C24.0Malignant neoplasm of extrahepatic bile duct
    C24.1Malignant neoplasm of ampulla of Vater
    C24.8Malignant neoplasm of overlapping sites of biliary tract
    C24.9Malignant neoplasm of biliary tract, unspecified

    DRG Codes

    3 rows

    DRG CodeDescription
    435Malignancy of Hepatobiliary System or Pancreas with MCC
    436Malignancy of Hepatobiliary System or Pancreas with CC
    437Malignancy of Hepatobiliary System or Pancreas without CC/MCC

    Typical Clinical Scenarios

    • An older adult presents to the emergency department with progressive jaundice, right upper quadrant pain, and dark urine over several weeks; imaging (CT/MRI) demonstrates a mass at the hepatic hilum causing extrahepatic biliary obstruction and cholestasis, and biopsy confirms a malignant tumor arising in the common hepatic duct. A diagnosis from this group is assigned because the neoplasm involves an extrahepatic portion of the biliary tract leading to obstructive symptoms. Typical codes: C24.1, C24.9
    • A middle-aged patient with a prior history of cholangitis and primary sclerosing cholangitis is followed in hepatology clinic for worsening cholestatic liver tests and new weight loss; cholangioscopy with biopsy reveals a malignancy of an intrahepatic bile duct segment not otherwise specified. A code from this group is used to capture a malignant biliary neoplasm identified during chronic disease surveillance. Typical codes: C24.8, C24.9
    • A hospitalized patient develops progressive obstructive jaundice and ascending cholangitis secondary to a tumor located in the ampulla of Vater region with local invasion confirmed on endoscopy and pathology, complicating their admission and requiring biliary drainage. A diagnosis from this group is reported to document a malignant neoplasm of a specific other/unspecified part of the biliary tract as a complication of the current admission. Typical codes: C24.0, C24.8

    Related Codes

    C15-MALIGNANT-NEOPLASM-OF-ESOPHAGUS

    ICD-10-CM Code For Malignant Neoplasm Of Esophagus: Group Overview

    C16-MALIGNANT-NEOPLASM-OF-STOMACH

    ICD-10-CM Code For Malignant Neoplasm Of Stomach: Group Overview

    C17-MALIGNANT-NEOPLASM-OF-SMALL-INTESTINE

    ICD-10-CM Code For Malignant Neoplasm Of Small Intestine: Group Overview

    C18-MALIGNANT-NEOPLASM-OF-COLON

    ICD-10-CM Code For Malignant Neoplasm Of Colon: Group Overview

    C19-MALIGNANT-NEOPLASM-OF-RECTOSIGMOID-JUNCTION

    ICD-10-CM Code For Malignant Neoplasm Of Rectosigmoid Junction: Group Overview

    C20-MALIGNANT-NEOPLASM-OF-RECTUM

    ICD-10-CM Code For Malignant Neoplasm Of Rectum: Group Overview

    C21-MALIGNANT-NEOPLASM-OF-ANUS-AND-ANAL-CANAL

    ICD-10-CM Code For Malignant Neoplasm Of Anus And Anal Canal: Group Overview

    C22-MALIGNANT-NEOPLASM-OF-LIVER

    ICD-10-CM Code For Malignant Neoplasm Of Liver And Intrahepatic Bile Ducts: Group Overview

    C23-MALIGNANT-NEOPLASM-OF-GALLBLADDER

    ICD-10-CM Code For Malignant Neoplasm Of Gallbladder: Group Overview

    C26-MALIGNANT-NEOPLASM-OTHER-ILL-DEFINED-DIGESTIVE-ORGANS

    ICD-10-CM Code For Malignant Neoplasm Of Other And Ill-Defined Digestive Organs: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.