ICD-10 · PDGM grouping
I23 Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)
All 9 codes in the I23 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
9
Cannot lead a claim
0
What CMS assigns to I23
All 9 codes group to MMTA - Cardiac and Circulatory. None of the 9 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in I23
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 |
|---|---|---|---|---|
| I23.0 | Hemopericardium as current complication following acute myocardial infarctionCMS: Hemopericardium as current complication following AMI | Can lead a claim | H | None |
| I23.1 | Atrial septal defect as current complication following acute myocardial infarctionCMS: Atrial septal defect as current complication following AMI | Can lead a claim | H | None |
| I23.2 | Ventricular septal defect as current complication following acute myocardial infarctionCMS: Ventricular septal defect as current comp following AMI | Can lead a claim | H | None |
| I23.3 | Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarctionCMS: Rupture of card wall w/o hemoperic as current comp fol AMI | Can lead a claim | H | None |
| I23.4 | Rupture of chordae tendineae as current complication following acute myocardial infarctionCMS: Rupture of chord tendne as current comp following AMI | Can lead a claim | H | None |
| I23.5 | Rupture of papillary muscle as current complication following acute myocardial infarctionCMS: Rupture of papillary muscle as current comp following AMI | Can lead a claim | H | None |
| I23.6 | Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarctionCMS: Thombos of atrium/auric append/ventr as current comp fol AMI | Can lead a claim | H | None |
| I23.7 | Postinfarction angina | Can lead a claim | H | None |
| I23.8 | Other current complications following acute myocardial infarctionCMS: Oth current complications following AMI | 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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