ICD-10-CM Codes
G00-G99 Diseases of the nervous system
G40-G47 Episodic and paroxysmal disorders
G46- Vascular syndromes of brain in cerebrovascular diseases
2021 ICD-10-CM Diagnosis Code G46.4

2021 ICD-10-CM Diagnosis Code G46.4

Cerebellar stroke syndrome

2016

2017

2018

2019

2020

2021

Billable/Specific Code

G46.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM G46.4 became effective on October 1, 2020.
This is the American ICD-10-CM version of G46.4 - other international versions of ICD-10 G46.4 may differ.

The following code(s) above G46.4 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to G46.4:

G00-G99
2021 ICD-10-CM Range G00-G99
Diseases of the nervous system
Type 2 Excludes
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Diseases of the nervous system
G46
ICD-10-CM Diagnosis Code G46
Vascular syndromes of brain in cerebrovascular diseases
Code First
- underlying cerebrovascular disease (I60-I69)
Vascular syndromes of brain in cerebrovascular diseases

Approximate Synonyms

Cerebellar infarct

ICD-10-CM G46.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

070 Nonspecific cerebrovascular disorders with mcc
071 Nonspecific cerebrovascular disorders with cc
072 Nonspecific cerebrovascular disorders without cc/mcc

Convert G46.4 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to G46.4:

Syndrome - see also Disease
- cerebellar
  - stroke G46.4
- lateral
  - medullary G46.4
- dorsolateral medullary G46.4

ICD-10-CM Codes Adjacent To G46.4

G45.2 Multiple and bilateral precerebral artery syndromes

G45.3 Amaurosis fugax

G45.4 Transient global amnesia

G45.8 Other transient cerebral ischemic attacks and related syndromes

G45.9 Transient cerebral ischemic attack, unspecified

G46 Vascular syndromes of brain in cerebrovascular diseases

G46.0 Middle cerebral artery syndrome

G46.1 Anterior cerebral artery syndrome

G46.2 Posterior cerebral artery syndrome

G46.3 Brain stem stroke syndrome

G46.4 Cerebellar stroke syndrome

G46.5 Pure motor lacunar syndrome

G46.6 Pure sensory lacunar syndrome

G46.7 Other lacunar syndromes

G46.8 Other vascular syndromes of brain in cerebrovascular diseases

G47 Sleep disorders

G47.0 Insomnia

G47.00 …… unspecified

G47.01 …… due to medical condition

G47.09 Other insomnia

G47.1 Hypersomnia

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code G46.4

Cerebellar stroke syndrome

Diseases of the nervous system

Vascular syndromes of brain in cerebrovascular diseases