ICD-10 · PDGM grouping
I79 Disorders of arteries, arterioles and capillaries in diseases classified elsewhere
All 3 codes in the I79 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
3
Can lead a claim
0
Cannot lead a claim
3
What CMS assigns to I79
None of the 3 codes is assigned a clinical group. 1 of the 3 counts toward the Atherosclerosis, includes Peripheral Vascular Disease, Aortic Aneurysms and Hypotension comorbidity subgroup; 2 are assigned none. None can lead a claim. CMS attaches a code-first note to all 3.
- Atherosclerosis, includes Peripheral Vascular Disease, Aortic Aneurysms and Hypotension: counts toward the high comorbidity tier only in an interaction pair.
Code first
CMS grouper convention 12, on I79.0, I79.1. Code first:
- underlying disease
CMS grouper convention 76, on I79.8. Code first:
- underlying amyloidosis (E85.-)
Every code in I79
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 |
|---|---|---|---|---|
| I79.0 | Aneurysm of aorta in diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | Atherosclerosis, includes Peripheral Vascular Disease, Aortic Aneurysms and Hypotension |
| I79.1 | Aortitis in diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| I79.8 | Other disorders of arteries, arterioles and capillaries in diseases classified elsewhereCMS: Oth disord of art,arterioles & capilare in dis classd elswhr | Cannot lead a claimManifestation code is not reportable as principal diagnosis | 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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