2026 ICD-10-CM Diagnosis Code C26Malignant neoplasm of other and ill-defined digestive organs

ICD-10-CM Codes›C00–D49›C15-C26›C26

ICD-10-CM C26
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C26 is a non-billable ICD-10-CM category code for malignant neoplasm of other and ill-defined digestive organs, so it cannot be submitted on claims. Use a more specific code from this category instead, such as C26.0, C26.1, and C26.9.

Code Identity

ICD-10-CM Code
C26
Billable Status
No — Non-Billable Category
Code Describes
Malignant neoplasm of other and ill-defined digestive organs
Short Description
Malignant neoplasm of other and ill-defined digestive organs
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
CategoryC26Malignant neoplasm of other and ill-defined digestive organs
This CodeC26Malignant neoplasm of other and ill-defined digestive organs

Specific Coding for Malignant neoplasm of other and ill-defined digestive organsOverview

Non-specific codes like C26 require more characters. Use one of these billable codes instead:

  • Use C26.0 for Malignant neoplasm of intestinal tract, part unspecified

  • Use C26.1 for Malignant neoplasm of spleen

  • Use C26.9 for Malignant neoplasm of ill-defined sites within the digestive system

Tabular List NotesGuidance

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

Type 1 Excludes

  • malignant neoplasm of peritoneum and retroperitoneum C48

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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 C26Overview

Is C26 (Malignant neoplasm of other and ill-defined digestive organs) a billable code?

No. This is a category header that groups the codes for malignant neoplasm of other and ill-defined digestive organs, and headers cannot be submitted on claims. Claims for malignant neoplasm of other and ill-defined digestive organs need a more specific code from this category, such as C26.0, C26.1, and C26.9.