Is C26 a billable ICD-10-CM code?

No. C26 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C26 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).

What cannot be coded together with C26?

C26 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C26

C26 — Malignant neoplasm of other and ill-defined digestive organs

Non-billable headerICD-10-CM

C26 is a non-billable header ICD-10-CM code for malignant neoplasm of other and ill-defined digestive organs. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

malignant neoplasm of peritoneum and retroperitoneum (C48.-)

Risk adjustment

C26 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead C26

3 child codes. Green means billable.

Questions about C26

Is C26 a billable ICD-10-CM code?: No. C26 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C26 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).
What cannot be coded together with C26?: C26 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.