C17Header code — not billable

Malignant neoplasm of small intestine

Chapter
2. Neoplasms
Category
C17
Effective date
October 1, 2026

Related codes in category C17

C17.0Malignant neoplasm of duodenumYesC17.1Malignant neoplasm of jejunumYesC17.2Malignant neoplasm of ileumYesC17.3Meckel's diverticulum, malignantYesC17.8Malignant neoplasm of overlapping sites of small intestineYesC17.9Malignant neoplasm of small intestine, unspecifiedYes

Frequently asked questions

What is ICD-10 code C17?

C17 is an ICD-10-CM diagnosis code for Malignant neoplasm of small intestine.

Is C17 a billable code?

No. C17 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is C17 in?

C17 falls under Chapter 2: Neoplasms.

When did C17 become effective?

C17 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C17?

C17 belongs to category C17, which includes 6 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.