ICD-10 · PDGM grouping
I20 Angina pectoris
All 6 codes in the I20 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 I20
All 6 codes group to MMTA - Cardiac and Circulatory. All 6 count toward the Other Heart Diseases comorbidity subgroup. Every code can lead a claim.
- Other Heart Diseases: counts toward the high comorbidity tier only in an interaction pair.
Every code in I20
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 |
|---|---|---|---|---|
| I20.0 | Unstable angina | Can lead a claim | H | Other Heart Diseases |
| I20.1 | Angina pectoris with documented spasm | Can lead a claim | H | Other Heart Diseases |
| I20.2 | Refractory angina pectoris | Can lead a claim | H | Other Heart Diseases |
| I20.8 Other forms of angina pectoris | ||||
| I20.81 | Angina pectoris with coronary microvascular dysfunction | Can lead a claim | H | Other Heart Diseases |
| I20.89 | Other forms of angina pectoris | Can lead a claim | H | Other Heart Diseases |
| I20.9 | Angina pectoris, unspecified | Can lead a claim | H | Other Heart 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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