G45.4

G45.4: Transient global amnesia

Billable / specific codeICD-10-CM

G45.4 is a billable, specific ICD-10-CM code for transient global amnesia. It is valid for submission on a claim.

Check G45.4 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

amnesia NOS (R41.3)

Excludes1 inherited from the categories above G45.4

A category’s note binds every code beneath it.

Written on G45: Transient cerebral ischemic attacks and related syndromes

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

Other codes that can never be billed with G45.4

Their own Excludes1 notes name this code, so the conflict is not listed above.

I65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
R41.3Other amnesia

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

G45.4 is named in 14 Medicare coverage policies: 14 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A56551Billing and Coding: Visual Fields Testing
A56612Billing and Coding: CT of the Head
A56697Billing and Coding: Non-Invasive Vascular Studies

Alphabetic index entries that lead here

Amnesia›transient global

Code history

Unchanged in every release from FY2024 to FY2027.