Is C30 a billable ICD-10-CM code?

No. C30 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C30 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of respiratory and intrathoracic organs (C30-C39).

C30

C30 — Malignant neoplasm of nasal cavity and middle ear

Non-billable headerICD-10-CM

C30 is a non-billable header ICD-10-CM code for malignant neoplasm of nasal cavity and middle ear. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with C30

These codes carry an Excludes1 note pointing at C30. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C30 alone.

C41Malignant neoplasm of bone and articular cartilage of other and unspecified sites
C49Malignant neoplasm of other connective and soft tissue

Risk adjustment

C30 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 C30

2 child codes. Green means billable.

Questions about C30

Is C30 a billable ICD-10-CM code?: No. C30 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C30 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of respiratory and intrathoracic organs (C30-C39).