Is D33.9 a billable ICD-10-CM code?

Yes. D33.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does D33.9 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 D33.9?

D33.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D33.9 (D33) and apply to it just the same.

D33.9

D33.9 — Benign neoplasm of central nervous system, unspecified

Billable / specific codeICD-10-CM

D33.9 is a billable, specific ICD-10-CM code for benign neoplasm of central nervous system, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Benign neoplasm of nervous system (central) NOS

Excludes1 inherited from the categories above D33.9

These are not written on D33.9, but they bind it: a note on a category applies to every code beneath it. Billing D33.9 with anything listed here is a denial.

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

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-)

Risk adjustment

D33.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 23 Prostate, Breast, and Other Cancers and Tumors0.186 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

D33.9 is named in 9 Medicare coverage policies — 9 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56695Billing and Coding: Implantable Infusion Pump
A56722Billing and Coding: Intraoperative Neurophysiological Testing
A56827Billing and Coding: Proton Beam Therapy
A57041Billing and Coding: Somatosensory Testing

Code history

D33.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share D33. If D33.9 is not quite right, the correct code is usually one of these.

Questions about D33.9

Is D33.9 a billable ICD-10-CM code?: Yes. D33.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D33.9 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 D33.9?: D33.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D33.9 (D33) and apply to it just the same.