C22.1 – Intrahepatic bile duct carcinoma

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of digestive organs

Billable code

ICD-10-CM code C22.1

Code: C22.1 (claims format: C221)
Description: Intrahepatic bile duct carcinoma
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C15-C26 Malignant neoplasms of digestive organs
Parent codes: C22

Notes for C22.1

Applicable to:

Cholangiocarcinoma

Excludes1 (not coded here):

malignant neoplasm of hepatic duct (C24.0)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C22 – Malignant neoplasm of liver and intrahepatic bile ducts

Excludes1 (not coded here):

malignant neoplasm of biliary tract NOS (C24.9)
secondary malignant neoplasm of liver and intrahepatic bile duct (C78.7)

Use additional code:

code to identify:
alcohol abuse and dependence (F10.-)
hepatitis B (B16.-, B18.0-B18.1)
hepatitis C (B17.1-, B18.2)

Block C15-C26

Excludes1 (not coded here):

Kaposi's sarcoma of gastrointestinal sites (C46.4)

Excludes2 (not included here):

gastrointestinal stromal tumors (C49.A-)

Index terms for C22.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in C22

C22.0 – Liver cell carcinomaBillable
C22.2 – HepatoblastomaBillable
C22.3 – Angiosarcoma of liverBillable
C22.4 – Other sarcomas of liverBillable
C22.7 – Other specified carcinomas of liverBillable
C22.8 – Malignant neoplasm of liver, primary, unspecified as to typeBillable
C22.9 – Malignant neoplasm of liver, not specified as primary or secondaryBillable

Frequently asked questions

What is ICD-10 code C22.1?

C22.1 is the ICD-10-CM code for intrahepatic bile duct carcinoma, in the block C15-C26 (Malignant neoplasms of digestive organs).

Is C22.1 a billable code?

Yes. C22.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C22.1 belong to?

It belongs to category C22 – Malignant neoplasm of liver and intrahepatic bile ducts.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.