Is C11 a billable ICD-10-CM code?

No. C11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C11 sit in the tabular list?

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

C11

C11 — Malignant neoplasm of nasopharynx

Non-billable headerICD-10-CM

C11 is a non-billable header ICD-10-CM code for malignant neoplasm of nasopharynx. 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:
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Other codes that can never be billed with C11

These codes carry an Excludes1 note pointing at C11. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C11 alone.

C30.0Malignant neoplasm of nasal cavity

Risk adjustment

C11 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 C11

6 child codes. Green means billable.

Questions about C11

Is C11 a billable ICD-10-CM code?: No. C11 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C11 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lip, oral cavity and pharynx (C00-C14).