ICD-10 Code G45.8 – Other transient cerebral ischemic attacks and related syndromes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G45.8 – Other transient cerebral ischemic attacks and related syndromes
What it is
G45.8 identifies transient neurologic episodes thought to be due to temporary cerebral ischemia, but not classified in a more specific transient ischemic attack category. The symptoms resolve, and the record should support a brief, reversible event.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include sudden focal neurologic deficits such as weakness, speech disturbance, numbness, visual change, or imbalance that improve within a short period.
When to use this code
Use G45.8 when the provider documents a transient ischemic attack or related syndrome that does not fit a more specific ICD-10-CM code. It is appropriate when the event is temporary and the note supports ischemic origin, but the exact syndrome is not further defined.
Do not use for
Do not use this code for completed stroke, persistent neurologic deficit, or symptoms with another confirmed cause. Check documentation if the episode is described only as dizziness, syncope, or nonspecific weakness without a TIA diagnosis.
Coding tip
Code the documented diagnosis, not the symptom alone, and verify whether a more specific transient ischemic attack code applies.