ICD-10 Code G45 – Transient cerebral ischemic attacks and related syndromes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G45 – Transient cerebral ischemic attacks and related syndromes
What it is
G45 covers transient episodes of brain ischemia that cause temporary neurologic symptoms without a persistent stroke diagnosis. It includes transient ischemic attack and related syndromes.
Clinical signs
Clinical features vary; refer to documentation. Common findings include sudden, focal neurologic deficits such as weakness, speech disturbance, or vision loss that resolve completely or improve quickly.
When to use this code
Use G45 when the provider documents TIA, amaurosis fugax, or another transient cerebral ischemic syndrome. Code it when symptoms are temporary and the record does not support an acute infarction. Check documentation if the note is unclear about stroke versus TIA.
Do not use for
Do not use this code for confirmed cerebral infarction, hemorrhagic stroke, or nonspecific dizziness alone. If the episode is better explained by another cause, code the documented diagnosis instead.
Coding tip
Verify that the provider documents a transient ischemic event and not an established stroke before assigning G45.