NPI Atlas

C17.0 – Malignant neoplasm of duodenum

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

Billable code

ICD-10-CM code C17.0

Code: C17.0 (claims format: C170)
Description: Malignant neoplasm of duodenum
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: C17

Notes inherited from parent codes

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

C17 – Malignant neoplasm of small intestine

Excludes1 (not coded here):

malignant carcinoid tumors of the small intestine (C7A.01)

Block C15-C26

Excludes1 (not coded here):

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

Excludes2 (not included here):

gastrointestinal stromal tumors (C49.A-)

Related codes in C17

C17.1 – Malignant neoplasm of jejunumBillable
C17.2 – Malignant neoplasm of ileumBillable
C17.3 – Meckel's diverticulum, malignantBillable
C17.8 – Malignant neoplasm of overlapping sites of small intestineBillable
C17.9 – Malignant neoplasm of small intestine, unspecifiedBillable

Frequently asked questions

What is ICD-10 code C17.0?

C17.0 is the ICD-10-CM code for malignant neoplasm of duodenum, in the block C15-C26 (Malignant neoplasms of digestive organs).

Is C17.0 a billable code?

Yes. C17.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C17.0 belong to?

It belongs to category C17 – Malignant neoplasm of small intestine.

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.