All ICD10 Codes
C26Not billable, use a more specific code below

Malignant neoplasm of other and ill-defined digestive organs

In Malignant neoplasms of digestive organs (C15-C26), chapter 2: Neoplasms

3 billable codes under C26: none are a CC or MCC; all map to HCC 22 (Bladder, Colorectal, and Other Cancers).An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Excludes1: not coded here, use a different code

  • malignant neoplasm of peritoneum and retroperitoneum (C48.-)

Also applies, from Malignant neoplasms of digestive organs (C15-C26)

These notes sit on C15-C26 and apply to every code under it, including C26.

Excludes1: not coded here, use a different code

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

Excludes2: not included here, code separately if applicable

  • gastrointestinal stromal tumors (C49.A-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.

Read Section I.C.2 (page 32), 12 more topics

All codes under C26

C26 can't be used on a claim. Pick a billable code below; grey headings group them.

C26 MS-DRGs

As the principal diagnosis, the billable codes under C26 group to these 15 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to C26

Notes on these codes point to C26.

  • Z80.0 Includes: Conditions classifiable to C15-C26

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Cancer

Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor.

Read more about cancer on MedlinePlus

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion. Your digestive system is a series of hollow organs joined in a long, twisting tube. It runs from your mouth to your anus and includes your esophagus, stomach, and small and large intestines. Your liver, gallbladder and pancreas are also involved. They produce juices to help digestion.

Read more about digestive diseases on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.