ICD-10 · PDGM grouping
G46 Vascular syndromes of brain in cerebrovascular diseases
All 9 codes in the G46 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
9
Can lead a claim
0
Cannot lead a claim
9
What CMS assigns to G46
None of the 9 codes is assigned a clinical group. 3 of the 9 count toward the Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases comorbidity subgroup; 6 are assigned none. None can lead a claim. CMS attaches a code-first note to all 9.
- Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases
Code first
CMS grouper convention 37, on all 9 codes. Code first:
- underlying cerebrovascular disease (I60-I69)
Every code in G46
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 |
|---|---|---|---|---|
| G46.0 | Middle cerebral artery syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G46.1 | Anterior cerebral artery syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G46.2 | Posterior cerebral artery syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Transient Ischemic Attacks and Vascular Syndromes in Cerebrovascular Diseases |
| G46.3 | Brain stem stroke syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G46.4 | Cerebellar stroke syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G46.5 | Pure motor lacunar syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G46.6 | Pure sensory lacunar syndrome | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G46.7 | Other lacunar syndromes | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| G46.8 | Other vascular syndromes of brain in cerebrovascular diseasesCMS: Oth vascular syndromes of brain in cerebrovascular diseases | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
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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