ICD10BillableValid for clinical use
ICD-10 Code D33.9: Benign neoplasm of central nervous system, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents benign neoplasm of central nervous system, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
D10-D36Benign neoplasms, except benign neuroendocrine tumors
category
D33Benign neoplasm of brain and other parts of central nervous system
currentD33
Official coding notes
Inclusion terms
- Benign neoplasm of nervous system (central) NOS
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
OncologistGeneral Physician
Related codes
D33.0Benign neoplasm of brain, supratentorialcodeD33.1Benign neoplasm of brain, infratentorialcodeD33.2Benign neoplasm of brain, unspecifiedcodeD33.3Benign neoplasm of cranial nervescodeD33.4Benign neoplasm of spinal cordcodeD33.7Benign neoplasm of other specified parts of central nervous systemcode
Sibling codes
D33.0Benign neoplasm of brain, supratentorialbillableD33.1Benign neoplasm of brain, infratentorialbillableD33.2Benign neoplasm of brain, unspecifiedbillableD33.3Benign neoplasm of cranial nervesbillableD33.4Benign neoplasm of spinal cordbillableD33.7Benign neoplasm of other specified parts of central nervous systembillable
Coverage-related procedures and services
CPT 95940high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING IN THE OPERATING ROOM, ONE ON ONE MONITORING REQUIRING PERSONAL ATTENDANCE, EACH 15 MINUTES (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
HCPCS G0453high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING, FROM OUTSIDE THE OPERATING ROOM (REMOTE OR NEARBY), PER PATIENT, (ATTENTION DIRECTED EXCLUSIVELY TO ONE PATIENT) EACH 15 MINUTES (LIST IN ADDITION TO PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 64417high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; AXILLARY NERVE, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64416high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; BRACHIAL PLEXUS, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64415high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; BRACHIAL PLEXUS, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64448high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; FEMORAL NERVE, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 838304009high
Benign ependymoma of central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 92048008high
Benign neoplasm of central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 92247009high
Benign neoplasm of nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 782680004high
Gangliocytoma of central nervous system
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
D33.9
Common synonyms
Benign neoplasm of central nervous system, unspecifiedBenign neoplasm of central nervous system
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.