Is C46 a billable ICD-10-CM code?

No. C46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C46 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of mesothelial and soft tissue (C45-C49).

C46

C46 — Kaposi's sarcoma

Non-billable headerICD-10-CM

C46 is a non-billable header ICD-10-CM code for kaposi's sarcoma. It cannot be billed on its own: choose one of the more specific child codes below.

Code first

The underlying condition must be sequenced before this code.

any human immunodeficiency virus [HIV] disease (B20)

Other codes that can never be billed with C46

These codes carry an Excludes1 note pointing at C46. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C46 alone.

C05Malignant neoplasm of palate
C34Malignant neoplasm of bronchus and lung
C44Other and unspecified malignant neoplasm of skin
C47Malignant neoplasm of peripheral nerves and autonomic nervous system
C48Malignant neoplasm of retroperitoneum and peritoneum

Risk adjustment

C46 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 C46

8 child codes. Green means billable.

Questions about C46

Is C46 a billable ICD-10-CM code?: No. C46 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C46 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of mesothelial and soft tissue (C45-C49).