ICD-10 · PDGM grouping
G45 Transient cerebral ischemic attacks and related syndromes
All 7 codes in the G45 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
7
Can lead a claim
7
Cannot lead a claim
0
What CMS assigns to G45
All 7 codes group to Neuro Rehabilitation. 5 of the 7 count toward the Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases comorbidity subgroup; 2 are assigned none. Every code can lead a claim.
- Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases
Every code in G45
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| G45.0 | Vertebro-basilar artery syndrome | Can lead a claim | B | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G45.1 | Carotid artery syndrome (hemispheric) | Can lead a claim | B | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G45.2 | Multiple and bilateral precerebral artery syndromes | Can lead a claim | B | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G45.3 | Amaurosis fugax | Can lead a claim | B | None |
| G45.4 | Transient global amnesia | Can lead a claim | B | None |
| G45.8 | Other transient cerebral ischemic attacks and related syndromesCMS: Oth transient cerebral ischemic attacks and related synd | Can lead a claim | B | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G45.9 | Transient cerebral ischemic attack, unspecified | Can lead a claim | B | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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