ICD-10 · PDGM grouping
I1A Other hypertension
The one code in the I1A 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
1
Can lead a claim
1
Cannot lead a claim
0
What CMS assigns to I1A
This code groups to MMTA - Cardiac and Circulatory. It is assigned no comorbidity subgroup. It can lead a claim. CMS attaches a code-first note to it.
Code first
CMS grouper convention 60. Code first:
- essential hypertension (I10)
- secondary hypertension (I15.-)
- specific type of existing hypertension, if known, such as:
The I1A code
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 |
|---|---|---|---|---|
| I1A.0 | Resistant hypertension | Can lead a claim, code first applies | H | 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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue