G45.9

G45.9: Transient cerebral ischemic attack, unspecified

Billable / specific codeICD-10-CM

G45.9 is a billable, specific ICD-10-CM code for transient cerebral ischemic attack, unspecified. It is valid for submission on a claim.

Check G45.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Spasm of cerebral artery
TIA
Transient cerebral ischemia NOS

Excludes1 inherited from the categories above G45.9

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 G45.9

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
R29.5Transient paralysis

Risk adjustment

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

Medicare coverage

G45.9 is named in 39 Medicare coverage policies: 39 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders

Alphabetic index entries that lead here

Angiospasm›cerebral
Attack, attacks›transient ischemic(TIA)
Claudication›cerebral(artery)
Spasm, spastic, spasticity›cerebral(arteries) (vascular)
Disease, diseased›angiospastic›cerebral
Ischemia, ischemic›cerebral›intermittent
Ischemia, ischemic›cerebral›transient
Spasm, spastic, spasticity›artery›cerebral

Code history

Unchanged in every release from FY2024 to FY2027.