Transient cerebral ischemic attacks and related syndromes
In Episodic and paroxysmal disorders (G40-G47), chapter 6: Diseases of the Nervous System
7 billable codes under G45: 6 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G45
G45 can't be used on a claim. Pick a billable code below; grey headings group them.
- G45.0Vertebro-basilar artery syndrome
- G45.1Carotid artery syndrome (hemispheric)
- G45.2Multiple and bilateral precerebral artery syndromes
- G45.3Amaurosis fugax
- G45.4Transient global amnesia
- G45.8Other transient cerebral ischemic attacks and related syndromes
- G45.9Transient cerebral ischemic attack, unspecified
G45 MS-DRGs
As the principal diagnosis, the billable codes under G45 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 061 Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with MCC (5 of 7 codes)
- DRG 062 Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with CC (5 of 7 codes)
- DRG 063 Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent without CC/MCC (5 of 7 codes)
- DRG 069 Transient Ischemia without Thrombolytic (5 of 7 codes)
- DRG 070 Other Cerebrovascular Disorders with MCC (1 of 7 codes)
- DRG 071 Other Cerebrovascular Disorders with CC (1 of 7 codes)
- DRG 072 Other Cerebrovascular Disorders without CC/MCC (1 of 7 codes)
- DRG 123 Neurological Eye Disorders (1 of 7 codes)
Other codes that refer to G45
Notes on these codes point to G45.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Transient Ischemic Attack
A transient ischemic attack (TIA) is a stroke that lasts only a few minutes. It happens when the blood supply to part of the brain is briefly blocked. Symptoms of a TIA are like other stroke symptoms, but do not last as long. They happen suddenly, and include:
Read more about transient ischemic attack on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.