Is C03 a billable ICD-10-CM code?

No. C03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C03 sit in the tabular list?

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

C03

C03 — Malignant neoplasm of gum

Non-billable headerICD-10-CM

C03 is a non-billable header ICD-10-CM code for malignant neoplasm of gum. 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 odontogenic neoplasms (C41.0-C41.1)

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)

Includes

Conditions this code covers.

malignant neoplasm of alveolar (ridge) mucosa
malignant neoplasm of gingiva

Risk adjustment

C03 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 C03

3 child codes. Green means billable.

Questions about C03

Is C03 a billable ICD-10-CM code?: No. C03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C03 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lip, oral cavity and pharynx (C00-C14).