2026 ICD-10-CM Diagnosis Code C17Malignant neoplasm of small intestine

ICD-10-CM Codes›C00–D49›C15-C26›C17

ICD-10-CM C17
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C17 is a non-billable ICD-10-CM category code for malignant neoplasm of small intestine, so it cannot be submitted on claims. Use a more specific code from this category instead, such as C17.0, C17.1, C17.2, and C17.3.

Code Identity

ICD-10-CM Code
C17
Billable Status
No — Non-Billable Category
Code Describes
Malignant neoplasm of small intestine
Short Description
Malignant neoplasm of small intestine
Same as the full description in the CMS dataset.
Chapter
C15-C26
Malignant neoplasms of digestive organs

Code Classification

ChapterC00–D49Neoplasms
SectionC15-C26Malignant neoplasms of digestive organs
CategoryC17Malignant neoplasm of small intestine
This CodeC17Malignant neoplasm of small intestine

Specific Coding for Malignant neoplasm of small intestineOverview

Non-specific codes like C17 require more characters. Use one of these billable codes instead:

  • Use C17.0 for Malignant neoplasm of duodenum

  • Use C17.1 for Malignant neoplasm of jejunum

  • Use C17.2 for Malignant neoplasm of ileum

  • Use C17.3 for Meckel's diverticulum, malignant

  • Use C17.8 for Malignant neoplasm of overlapping sites of small intestine

  • Use C17.9 for Malignant neoplasm of small intestine, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • malignant carcinoid tumors of the small intestine C7A.01

Patient EducationClinical

Intestinal Cancer

Your small intestine is part of your digestive system. It is a long tube that connects your stomach to your large intestine. Intestinal cancer is rare, but eating a high-fat diet or having Crohn's disease, celiac disease, or a history of colonic polyps can increase your risk.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C17Overview

Is C17 (Malignant neoplasm of small intestine) a billable code?

No. This is a category header that groups the codes for malignant neoplasm of small intestine, and headers cannot be submitted on claims. Claims for malignant neoplasm of small intestine need a more specific code from this category, such as C17.0, C17.1, and C17.2.