G45.4 Transient global amnesia

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• amnesia NOS (R41.3)

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) 070-072 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 437.7 Transient global amnesia

Code annotations containing back-references to G45.4

Back-references to G45.4

• Type 1 Excludes: R41.3 Other amnesia ("transient global amnesia (G45.4)")

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 G45.4

• Amnesia › transient global

Nearby codes

• G45 Transient cerebral ischemic attacks and related syndromes
• G45.0 Vertebro-basilar artery syndrome
• G45.1 Carotid artery syndrome (hemispheric)
• G45.2 Multiple and bilateral precerebral artery syndromes
• G45.3 Amaurosis fugax
• G45.4 Transient global amnesia (this code)
• G45.8 Other transient cerebral ischemic attacks and related syndromes
• G45.9 Transient cerebral ischemic attack, unspecified