ICD-10 Code G45.2 – Multiple and bilateral precerebral artery syndromes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G45.2 – Multiple and bilateral precerebral artery syndromes
What it is
This code identifies transient ischemic syndromes involving more than one precerebral artery, or both sides, before the vessels reach the brain. It signals a brief reduction in blood flow rather than a completed stroke.
Clinical signs
Clinical features vary; refer to documentation. Common findings include sudden, temporary neurologic deficits such as weakness, numbness, speech difficulty, or vision changes that resolve without persistent infarction.
When to use this code
Use G45.2 when the provider documents multiple or bilateral precerebral artery involvement causing transient ischemic symptoms. It is appropriate when the record links the episode to carotid, vertebral, or other precerebral arteries and does not describe a completed cerebral infarction.
Do not use for
Do not assign this code for stroke with established infarction, nonspecific dizziness, or symptoms without a documented vascular ischemic syndrome. Check documentation if the artery territory or laterality is unclear.
Coding tip
Confirm that the note specifies “multiple” or “bilateral” precerebral artery syndrome before coding G45.2.