2021 ICD-10-CM Code G46

Vascular syndromes of brain in cerebrovascular diseases

Version 2021

Not Valid for Submission

G46 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of vascular syndromes of brain in cerebrovascular diseases. The code is not specific and is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:G46
Short Description:Vascular syndromes of brain in cerebrovascular diseases
Long Description:Vascular syndromes of brain in cerebrovascular diseases

Code Classification

Specific Coding for Vascular syndromes of brain in cerebrovascular diseases

Non-specific codes like G46 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for vascular syndromes of brain in cerebrovascular diseases:

  • BILLABLE CODE - Use G46.0 for Middle cerebral artery syndrome
  • BILLABLE CODE - Use G46.1 for Anterior cerebral artery syndrome
  • BILLABLE CODE - Use G46.2 for Posterior cerebral artery syndrome
  • BILLABLE CODE - Use G46.3 for Brain stem stroke syndrome
  • BILLABLE CODE - Use G46.4 for Cerebellar stroke syndrome
  • BILLABLE CODE - Use G46.5 for Pure motor lacunar syndrome
  • BILLABLE CODE - Use G46.6 for Pure sensory lacunar syndrome
  • BILLABLE CODE - Use G46.7 for Other lacunar syndromes
  • BILLABLE CODE - Use G46.8 for Other vascular syndromes of brain in cerebrovascular diseases

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G46:


Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

Information for Patients


Brain Diseases

The brain is the control center of the body. It controls thoughts, memory, speech, and movement. It regulates the function of many organs. When the brain is healthy, it works quickly and automatically. However, when problems occur, the results can be devastating.

Inflammation in the brain can lead to problems such as vision loss, weakness and paralysis. Loss of brain cells, which happens if you suffer a stroke, can affect your ability to think clearly. Brain tumors can also press on nerves and affect brain function. Some brain diseases are genetic. And we do not know what causes some brain diseases, such as Alzheimer's disease.

The symptoms of brain diseases vary widely depending on the specific problem. In some cases, damage is permanent. In other cases, treatments such as surgery, medicines, or physical therapy can correct the source of the problem or improve symptoms.


[Learn More in MedlinePlus]

Vascular Diseases

What are vascular diseases?

Your vascular system is your body's network of blood vessels. It includes your

Vascular diseases are conditions which affect your vascular system. They are common and can be serious. Some types include

What causes vascular diseases?

The causes of vascular diseases depend on the specific disease. These causes include

Sometimes the cause is unknown.

Who is at risk for vascular diseases?

The risk factors for vascular diseases can vary, depending on the specific disease. But some of the more common risk factors include

What are the symptoms of vascular diseases?

The symptoms for each disease are different.

How are vascular diseases diagnosed?

To make a diagnosis, your health care provider will do a physical exam and ask about your symptoms and medical history. You may have imaging tests and/or blood tests.

How are vascular diseases treated?

Which treatment you get depends on which vascular disease you have and how severe it is. Types of treatments for vascular diseases include

Can vascular diseases be prevented?

There are steps you can take to help prevent vascular diseases:


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)