G45.0 Vertebro-basilar artery syndrome

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from G45 Transient cerebral ischemic attacks and related syndromes

Excludes1 (never code together)

• neonatal cerebral ischemia (P91.0)
• transient retinal artery occlusion (H34.0-)

MS-DRG index

Defines the logic of DRG(s) 061-063 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 435.0 Basilar artery syndrome (approximate)
• 435.1 Vertebral artery syndrome (approximate)
• 435.3 Vertebrobasilar artery syndrome (approximate)

Code annotations containing back-references to G45.0

Back-references to G45

• Type 2 Excludes: I63.9 Cerebral infarction, unspecified ("transient cerebral ischemic attacks and related syndromes (G45.-)")
• Type 1 Excludes: I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction ("insufficiency, NOS, of precerebral artery (G45.-)")

Diagnosis Index entries for G45.0

• Insufficiency, insufficient › arterial › basilar
• Insufficiency, insufficient › arterial › vertebral
• Syndrome › basilar artery
• Syndrome › vertebral › artery
• Syndrome › vertebral › steal
• Syndrome › vertebro-basilar artery

Nearby codes

• G45 Transient cerebral ischemic attacks and related syndromes
• G45.0 Vertebro-basilar artery syndrome (this code)
• G45.1 Carotid artery syndrome (hemispheric)
• G45.2 Multiple and bilateral precerebral artery syndromes
• G45.3 Amaurosis fugax
• G45.4 Transient global amnesia
• G45.8 Other transient cerebral ischemic attacks and related syndromes