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ICD-10-CM Code C22.1
Intrahepatic bile duct carcinoma

BILLABLE
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

C22.1 is a billable ICD code used to specify a diagnosis of intrahepatic bile duct carcinoma. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code C221 is used to code Cholangiocarcinoma

Cholangiocarcinoma is a form of cancer that is composed of mutated epithelial cells (or cells showing characteristics of epithelial differentiation) that originate in the bile ducts which drain bile from the liver into the small intestine. Other biliary tract cancers include gallbladder cancer and cancer of the ampulla of Vater.

Specialty: Oncology
MeSH Codes: D018281, D018281
ICD 9 Codes: 155.1, 156.1

Micrograph of an intrahepatic cholangiocarcinoma (right of image) adjacent to benign hepatocytes (left of image). H&E stain.

Source: Wikipedia

Coding Notes for C22.1 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Cholangiocarcinoma
Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Malignant neoplasm of hepatic duct - instead, use code C24.0

MS-DRG Mapping

  • DRG Group #435-437 - Malignancy of hepatobiliary system or pancreas with MCC.
  • DRG Group #435-437 - Malignancy of hepatobiliary system or pancreas with CC.
  • DRG Group #435-437 - Malignancy of hepatobiliary system or pancreas without CC or MCC.

Related Concepts SNOMET-CT

  • Intrahepatic bile duct carcinoma (disorder)

Coding Advice SNOMET-CT

  • Possible requirement for morphology code

ICD-10-CM Alphabetical Index References for 'C22.1 - Intrahepatic bile duct carcinoma'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code C22.1. Click on any term below to browse the alphabetical index.

ICD-10-CM Neoplasms Index References for 'C22.1 - Intrahepatic bile duct carcinoma'

The ICD-10-CM Neoplasms Index links the below-listed medical terms to the ICD code C22.1. Click on any term below to browse the neoplasms index.

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Malignant neoplasm of intrahepatic bile ducts (exact match)

This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code 155.1 was previously used, C22.1 is the appropriate modern ICD10 code.


Parent Code: C22 - Malignant neoplasm of liver and intrahepatic bile ducts

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/C221