2020 ICD-10-CM Diagnosis Code G46.4

Cerebellar stroke syndrome

    2016 2017 2018 2019 2020 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 2020 edition of ICD-10-CM G46.4 became effective on October 1, 2019.
  • 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
    2020 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

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    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 v37.0):
  • 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

Diagnosis Index entries containing back-references to 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.