2026 ICD-10-CM Diagnosis Code G46Vascular syndromes of brain in cerebrovascular diseases

ICD-10-CM Codes›G00–G99›G40-G47›G46

ICD-10-CM G46
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G46 is a non-billable ICD-10-CM category code for vascular syndromes of brain in cerebrovascular diseases, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G46.0, G46.1, G46.2, and G46.3.

Code Identity

ICD-10-CM Code
G46
Billable Status
No — Non-Billable Category
Code Describes
Vascular syndromes of brain in cerebrovascular diseases
Chapter
G40-G47
Episodic and paroxysmal disorders

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG40-G47Episodic and paroxysmal disorders
CategoryG46Vascular syndromes of brain in cerebrovascular diseases
This CodeG46Vascular syndromes of brain in cerebrovascular diseases

Specific Coding for Vascular syndromes of brain in cerebrovascular diseasesOverview

Non-specific codes like G46 require more characters. Use one of these billable codes instead:

  • Use G46.0 for Middle cerebral artery syndrome

  • Use G46.1 for Anterior cerebral artery syndrome

  • Use G46.2 for Posterior cerebral artery syndrome

  • Use G46.3 for Brain stem stroke syndrome

  • Use G46.4 for Cerebellar stroke syndrome

  • Use G46.5 for Pure motor lacunar syndrome

  • Use G46.6 for Pure sensory lacunar syndrome

  • Use G46.7 for Other lacunar syndromes

  • Use G46.8 for Other vascular syndromes of brain in cerebrovascular diseases

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code First

  • underlying cerebrovascular disease I60 I69

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G46Overview

Is G46 (Vascular syndromes of brain in cerebrovascular diseases) a billable code?

No. This is a category header that groups the codes for vascular syndromes of brain in cerebrovascular diseases, and headers cannot be submitted on claims. Claims for vascular syndromes of brain in cerebrovascular diseases need a more specific code from this category, such as G46.0, G46.1, and G46.2.