2022 ICD-10-CM Diagnosis Code G45

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2026

  1. ICD-10-CM Codes
    2. ›
  2. G00-G99
    3. ›
  3. G40-G47
    4. ›
  4. G45-
    5. ›
  5. 2026 ICD-10-CM Diagnosis Code G45
2026 ICD-10-CM Diagnosis Code G45

Transient cerebral ischemic attacks and related syndromes

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
  • G45 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2026 edition of ICD-10-CM G45 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of G45 - other international versions of ICD-10 G45 may differ.
Type 1 ExcludesType 1 Excludes HelpA type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G45. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • neonatal cerebral ischemia (ICD-10-CM Diagnosis Code P91.0

    Neonatal cerebral ischemia

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code Code on Newborn Record
    Type 1 Excludes
    • Neonatal cerebral infarction (P91.82-)
    P91.0)
  • transient retinal artery occlusion (ICD-10-CM Diagnosis Code H34.0

    Transient retinal artery occlusion

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    H34.0-)
The following code(s) above G45 contain annotation back-referencesAnnotation Back-ReferencesIn 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 G45:
  • G00-G99 2026 ICD-10-CM Range G00-G99

    Diseases of the nervous systemType 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

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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
  • 2026 (effective 10/1/2025): No change
Code annotations containing back-references to G45:
  • Type 1 Excludes: I65 ICD-10-CM Diagnosis Code I65

    Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Includes
    • embolism of precerebral artery
    • narrowing of precerebral artery
    • obstruction (complete) (partial) of precerebral artery
    • thrombosis of precerebral artery
    Type 1 Excludes
    • insufficiency, NOS, of precerebral artery (G45.-)
    • insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
  • Type 2 Excludes: I63.9 ICD-10-CM Diagnosis Code I63.9

    Cerebral infarction, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code
    Applicable To
    • Stroke NOS
    Type 2 Excludes
    • transient cerebral ischemic attacks and related syndromes (G45.-)
ICD-10-CM Codes Adjacent To G45 G44.53 Primary thunderclap headache G44.59 Other complicated headache syndrome G44.8 Other specified headache syndromes G44.81 Hypnic headache G44.82 Headache associated with sexual activity G44.83 Primary cough headache G44.84 Primary exertional headache G44.85 Primary stabbing headache G44.86 Cervicogenic headache G44.89 Other headache syndrome G45 Transient cerebral ischemic attacks and related syndromes G45.0 Vertebro-basilar artery syndrome G45.1 Carotid artery syndrome (hemispheric) 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

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

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