G45 ICD-10-CA category: Transient cerebral ischaemic attacks and related syndromes
G45 isn’t a code on its own. Choose one of the 7 codes beneath it, the one the documentation supports.
Official description
G45Transient cerebral ischaemic attacks and related syndromes
ICD-10-CA · Canada
Codes in G45
G45 isn’t a code on its own. Open the code that matches what the note documents.
G45.0Vertebro-basilar artery syndromeG45.1Carotid artery syndrome (hemispheric)G45.2Multiple and bilateral precerebral artery syndromesG45.3Amaurosis fugaxG45.4Transient global amnesiaG45.8Other transient cerebral ischaemic attacks and related syndromesG45.9Transient cerebral ischaemic attack, unspecifiedNotes for G45
As CIHI prints them, with any note G45 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Neonatal cerebral ischaemia (P91.0)
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)
Where G45 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G40-G47Episodic and paroxysmal disorders
- 3Category G45Transient cerebral ischaemic attacks and related syndromes
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is G45 a valid ICD-10-CA code?
No. G45 (Transient cerebral ischaemic attacks and related syndromes) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 7 codes; record the one the documentation supports.
Where is G45 in ICD-10-CA?
G45 sits under G40-G47 Episodic and paroxysmal disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G45?
ICD-10-CA lists Excludes notes for G45, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.