G45 – Transient cerebral ischemic attacks and related syndromes
ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders
ICD-10-CM code
G45
- Code
G45(claims format:G45)- Description
- Transient cerebral ischemic attacks and related syndromes
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 6. Diseases of the nervous system (G00-G99)
- Block
- G40-G47 Episodic and paroxysmal disorders
Billable codes under G45
G45 is a header code and cannot be used on claims. Choose the most specific code:
- G45.0 – Vertebro-basilar artery syndromeBillable
- G45.1 – Carotid artery syndrome (hemispheric)Billable
- G45.2 – Multiple and bilateral precerebral artery syndromesBillable
- G45.3 – Amaurosis fugaxBillable
- G45.4 – Transient global amnesiaBillable
- G45.8 – Other transient cerebral ischemic attacks and related syndromesBillable
- G45.9 – Transient cerebral ischemic attack, unspecifiedBillable
Notes for G45
Frequently asked questions
What is ICD-10 code G45?
G45 is the ICD-10-CM code for transient cerebral ischemic attacks and related syndromes, in the block G40-G47 (Episodic and paroxysmal disorders).
Is G45 a billable code?
No. G45 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.