ICD-10-CM Codes
C00-D49 Neoplasms
C15-C26 Malignant neoplasms of digestive organs
C24- Malignant neoplasm of other and unspecified parts of biliary tract
2021 ICD-10-CM Diagnosis Code C24

2021 ICD-10-CM Diagnosis Code C24

Malignant neoplasm of other and unspecified parts of biliary tract

2016

2017

2018

2019

2020

2021

Non-Billable/Non-Specific Code

C24 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
Short description: Malignant neoplasm of other and unsp parts of biliary tract
The 2021 edition of ICD-10-CM C24 became effective on October 1, 2020.
This is the American ICD-10-CM version of C24 - other international versions of ICD-10 C24 may differ.

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as C24. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

malignant neoplasm of intrahepatic bile duct (
ICD-10-CM Diagnosis Code C22.1
Intrahepatic bile duct carcinoma
Applicable To
- Cholangiocarcinoma
Type 1 Excludes
- malignant neoplasm of hepatic duct (C24.0)
C22.1
)

The following code(s) above C24 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to C24:

C00-D49
2021 ICD-10-CM Range C00-D49
Neoplasms
Note
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Neoplasms
C15-C26
2021 ICD-10-CM Range C15-C26
Malignant neoplasms of digestive organs
Type 1 Excludes
- Kaposi's sarcoma of gastrointestinal sites (C46.4)
Type 2 Excludes
- gastrointestinal stromal tumors (C49.A-)
Malignant neoplasms of digestive organs

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

ICD-10-CM Codes Adjacent To C24

C22 Malignant neoplasm of liver and intrahepatic bile ducts

C22.0 Liver cell carcinoma

C22.1 Intrahepatic bile duct carcinoma

C22.2 Hepatoblastoma

C22.3 Angiosarcoma of liver

C22.4 Other sarcomas of liver

C22.7 Other specified carcinomas of liver

C22.8 Malignant neoplasm of liver, primary, unspecified as to type

C22.9 Malignant neoplasm of liver, not specified as primary or secondary

C23 Malignant neoplasm of gallbladder

C24 Malignant neoplasm of other and unspecified parts of biliary tract

C24.0 Malignant neoplasm of extrahepatic bile duct

C24.1 Malignant neoplasm of ampulla of Vater

C24.8 Malignant neoplasm of overlapping sites of biliary tract

C24.9 Malignant neoplasm of biliary tract, unspecified

C25 Malignant neoplasm of pancreas

C25.0 Malignant neoplasm of head of pancreas

C25.1 Malignant neoplasm of body of pancreas

C25.2 Malignant neoplasm of tail of pancreas

C25.3 Malignant neoplasm of pancreatic duct

C25.4 Malignant neoplasm of endocrine pancreas

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code C24

Malignant neoplasm of other and unspecified parts of biliary tract

Intrahepatic bile duct carcinoma

Neoplasms

Malignant neoplasms of digestive organs