Is D33 a billable ICD-10-CM code?

No. D33 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does D33 sit in the tabular list?

Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).

What cannot be coded together with D33?

D33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

D33

D33 — Benign neoplasm of brain and other parts of central nervous system

Non-billable headerICD-10-CM

D33 is a non-billable header ICD-10-CM code for benign neoplasm of brain and other parts of central nervous system. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

angioma (D18.0-)
benign neoplasm of meninges (D32.-)
benign neoplasm of peripheral nerves and autonomic nervous system (D36.1-)
hemangioma (D18.0-)
neurofibromatosis (Q85.0-)
retro-ocular benign neoplasm (D31.6-)

Other codes that can never be billed with D33

These codes carry an Excludes1 note pointing at D33. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading D33 alone.

D14.0Benign neoplasm of middle ear, nasal cavity and accessory sinuses
D31Benign neoplasm of eye and adnexa
D33.0Benign neoplasm of brain, supratentorial
H93.3Disorders of acoustic nerve

Risk adjustment

D33 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 D33

7 child codes. Green means billable.

Questions about D33

Is D33 a billable ICD-10-CM code?: No. D33 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does D33 sit in the tabular list?: Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).
What cannot be coded together with D33?: D33 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.