Is C04 a billable ICD-10-CM code?

No. C04 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C04 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of lip, oral cavity and pharynx (C00-C14).

C04

C04 — Malignant neoplasm of floor of mouth

Non-billable headerICD-10-CM

C04 is a non-billable header ICD-10-CM code for malignant neoplasm of floor of mouth. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

code to identify:
alcohol abuse and dependence (F10.-)
history of tobacco dependence (Z87.891)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Risk adjustment

C04 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 C04

4 child codes. Green means billable.

Questions about C04

Is C04 a billable ICD-10-CM code?: No. C04 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C04 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lip, oral cavity and pharynx (C00-C14).