ICD-10 · PDGM grouping
I09 Other rheumatic heart diseases
All 6 codes in the I09 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
6
Can lead a claim
6
Cannot lead a claim
0
What CMS assigns to I09
All 6 codes group to MMTA - Cardiac and Circulatory. 1 of the 6 counts toward the Heart Failure comorbidity subgroup; 5 are assigned none. Every code can lead a claim.
- Heart Failure: can award the low comorbidity tier as a secondary diagnosis.
Every code in I09
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 |
|---|---|---|---|---|
| I09.0 | Rheumatic myocarditis | Can lead a claim | H | None |
| I09.1 | Rheumatic diseases of endocardium, valve unspecified | Can lead a claim | H | None |
| I09.2 | Chronic rheumatic pericarditis | Can lead a claim | H | None |
| I09.8 Other specified rheumatic heart diseases | ||||
| I09.81 | Rheumatic heart failure | Can lead a claim | H | Heart Failure |
| I09.89 | Other specified rheumatic heart diseases | Can lead a claim | H | None |
| I09.9 | Rheumatic heart disease, unspecified | Can lead a claim | 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.
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