Is ICD-10-CM code D33 billable?

No, D33 (Benign neoplasm of brain and other parts of central nervous system) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code D33 belong to?

D33 belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

D33Not billable, use a more specific code below

Benign neoplasm of brain and other parts of central nervous system

In Benign neoplasms, except benign neuroendocrine tumors (D10-D36), chapter 2: Neoplasms

7 billable codes under D33: none are a CC or MCC; all map to HCC 23 (Prostate, Breast, and Other Cancers and Tumors).An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Excludes1: not coded here, use a different code

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-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.

Admission/Encounter for treatment of primary site (page 33)
Admission/Encounter for treatment of secondary site (page 33)
Coding and sequencing of complications (page 34)
Primary malignancy previously excised (page 34)
Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
Admission/encounter to determine extent of malignancy (page 36)
Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
Admission/encounter for pain control/management (page 36)

Read Section I.C.2 (page 32), 12 more topics

All codes under D33

D33 can't be used on a claim. Pick a billable code below; grey headings group them.

D33 MS-DRGs

As the principal diagnosis, the billable codes under D33 group to MS-DRG 054, 055, 643, 644, or 645 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 054 Nervous System Neoplasms with MCC (7 of 7 codes)
DRG 055 Nervous System Neoplasms without MCC (7 of 7 codes)
DRG 643 Endocrine Disorders with MCC (1 of 7 codes)
DRG 644 Endocrine Disorders with CC (1 of 7 codes)
DRG 645 Endocrine Disorders without CC/MCC (1 of 7 codes)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body. Your nerves take in information from your senses and send it to the brain to be processed. Your brain and nerves also communicate to help you move and to control your body's functions.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.