Is C16 a billable ICD-10-CM code?

No. C16 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C16 sit in the tabular list?

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

C16

C16 — Malignant neoplasm of stomach

Non-billable headerICD-10-CM

C16 is a non-billable header ICD-10-CM code for malignant neoplasm of stomach. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

malignant carcinoid tumor of the stomach (C7A.092)

Use additional code

Add a secondary code to capture the detail described below.

code to identify:
alcohol abuse and dependence (F10.-)

Other codes that can never be billed with C16

These codes carry an Excludes1 note pointing at C16. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C16 alone.

C15.5Malignant neoplasm of lower third of esophagus

Risk adjustment

C16 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 C16

9 child codes. Green means billable.

Questions about C16

Is C16 a billable ICD-10-CM code?: No. C16 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C16 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of digestive organs (C15-C26).