ICD-10 · PDGM grouping
I20-I25 — Ischemic heart diseases
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
94
No clinical group
4
A period cannot be grouped from these.
Barred as primary
3
CMS rejects these in the primary position.
Where these codes group
90 of the 94 codes in I20-I25 group to MMTA - Cardiac and Circulatory. A further 4 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in I20-I25
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- I20Angina pectoris6 codes
- I21Acute myocardial infarction13 codes
- I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction5 codes
- I23Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)9 codes
- I24Other acute ischemic heart diseases5 codes
- I25Chronic ischemic heart disease56 codes
Every code in I20-I25
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| I200 | Unstable angina | H | Can lead a claim |
| I201 | Angina pectoris with documented spasm | H | Can lead a claim |
| I202 | Refractory angina pectoris | H | Can lead a claim |
| I2081 | Angina pectoris with coronary microvascular dysfunction | H | Can lead a claim |
| I2089 | Other forms of angina pectoris | H | Can lead a claim |
| I209 | Angina pectoris, unspecified | H | Can lead a claim |
| I2101 | STEMI involving left main coronary artery | H | Can lead a claim |
| I2102 | STEMI involving left anterior descending coronary artery | H | Can lead a claim |
| I2109 | STEMI involving oth coronary artery of anterior wall | H | Can lead a claim |
| I2111 | STEMI involving right coronary artery | H | Can lead a claim |
| I2119 | STEMI involving oth coronary artery of inferior wall | H | Can lead a claim |
| I2121 | STEMI involving left circumflex coronary artery | H | Can lead a claim |
| I2129 | STEMI involving oth sites | H | Can lead a claim |
| I213 | ST elevation (STEMI) myocardial infarction of unsp site | H | Can lead a claim |
| I214 | Non-ST elevation (NSTEMI) myocardial infarction | H | Can lead a claim |
| I219 | Acute myocardial infarction, unspecified | H | Can lead a claim |
| I21A1 | Myocardial infarction type 2 | H | Can lead a claim, code first applies |
| I21A9 | Other myocardial infarction type | H | Can lead a claim, code first applies |
| I21B | Myocardial infarction with coronary microvascular dysfnct | H | Can lead a claim |
| I220 | Subsequent STEMI of anterior wall | H | Can lead a claim |
| I221 | Subsequent STEMI of inferior wall | H | Can lead a claim |
| I222 | Subsequent non-ST elevation (NSTEMI) myocardial infarction | H | Can lead a claim |
| I228 | Subsequent STEMI of sites | H | Can lead a claim |
| I229 | Subsequent STEMI of unsp site | H | Can lead a claim |
| I230 | Hemopericardium as current complication following AMI | H | Can lead a claim |
| I231 | Atrial septal defect as current complication following AMI | H | Can lead a claim |
| I232 | Ventricular septal defect as current comp following AMI | H | Can lead a claim |
| I233 | Rupture of card wall w/o hemoperic as current comp fol AMI | H | Can lead a claim |
| I234 | Rupture of chord tendne as current comp following AMI | H | Can lead a claim |
| I235 | Rupture of papillary muscle as current comp following AMI | H | Can lead a claim |
| I236 | Thombos of atrium/auric append/ventr as current comp fol AMI | H | Can lead a claim |
| I237 | Postinfarction angina | H | Can lead a claim |
| I238 | Oth current complications following AMI | H | Can lead a claim |
| I240 | Acute coronary thrombosis not resulting in myocardial infrc | H | Can lead a claim |
| I241 | Dressler's syndrome | H | Can lead a claim |
| I2481 | Acute coronary microvascular dysfunction | H | Can lead a claim |
| I2489 | Other forms of acute ischemic heart disease | H | Can lead a claim |
| I249 | Acute ischemic heart disease, unspecified | H | Can lead a claim |
| I2510 | Athscl heart disease of native coronary artery w/o ang pctrs | H | Can lead a claim |
| I25110 | Athscl heart disease of native cor art w unstable ang pctrs | H | Can lead a claim |
| I25111 | Athscl heart disease of native cor art w ang pctrs w spasm | H | Can lead a claim |
| I25112 | Athscl heart dis of native cor art with refract ang pctrs | H | Can lead a claim |
| I25118 | Athscl heart disease of native cor art w oth ang pctrs | H | Can lead a claim |
| I25119 | Athscl heart disease of native cor art w unsp ang pctrs | H | Can lead a claim |
| I252 | Old myocardial infarction | None | Cannot lead a claim |
| I253 | Aneurysm of heart | H | Can lead a claim |
| I2541 | Coronary artery aneurysm | H | Can lead a claim |
| I2542 | Coronary artery dissection | H | Can lead a claim |
| I255 | Ischemic cardiomyopathy | H | Can lead a claim |
| I256 | Silent myocardial ischemia | H | Can lead a claim |
| I25700 | Atherosclerosis of CABG, unsp, w unstable angina pectoris | H | Can lead a claim |
| I25701 | Athscl CABG, unsp, w angina pectoris w documented spasm | H | Can lead a claim |
| I25702 | Athscl CABG, unspecified, with refractory angina pectoris | H | Can lead a claim |
| I25708 | Atherosclerosis of CABG, unsp, w oth angina pectoris | H | Can lead a claim |
| I25709 | Atherosclerosis of CABG, unsp, w unsp angina pectoris | H | Can lead a claim |
| I25710 | Athscl autologous vein CABG w unstable angina pectoris | H | Can lead a claim |
| I25711 | Athscl autologous vein CABG w ang pctrs w documented spasm | H | Can lead a claim |
| I25712 | Athscl autologous vein CABG with refractory angina pectoris | H | Can lead a claim |
| I25718 | Athscl autologous vein CABG w oth angina pectoris | H | Can lead a claim |
| I25719 | Athscl autologous vein CABG w unsp angina pectoris | H | Can lead a claim |
| I25720 | Athscl autologous artery CABG w unstable angina pectoris | H | Can lead a claim |
| I25721 | Athscl autologous artery CABG w ang pctrs w documented spasm | H | Can lead a claim |
| I25722 | Athscl autologous artery CABG with refractory ang pctrs | H | Can lead a claim |
| I25728 | Athscl autologous artery CABG w oth angina pectoris | H | Can lead a claim |
| I25729 | Athscl autologous artery CABG w unsp angina pectoris | H | Can lead a claim |
| I25730 | Athscl nonautologous biological CABG w unstable ang pctrs | H | Can lead a claim |
| I25731 | Athscl nonaut biological CABG w ang pctrs w documented spasm | H | Can lead a claim |
| I25732 | Athscl nonaut biological CABG with refractory ang pctrs | H | Can lead a claim |
| I25738 | Athscl nonautologous biological CABG w oth angina pectoris | H | Can lead a claim |
| I25739 | Athscl nonautologous biological CABG w unsp angina pectoris | H | Can lead a claim |
| I25750 | Athscl native cor art of txplt heart w unstable angina | H | Can lead a claim |
| I25751 | Athscl native cor art of txplt heart w ang pctrs w spasm | H | Can lead a claim |
| I25752 | Athscl native cor art of txplt heart with refract ang pctrs | H | Can lead a claim |
| I25758 | Athscl native cor art of transplanted heart w oth ang pctrs | H | Can lead a claim |
| I25759 | Athscl native cor art of transplanted heart w unsp ang pctrs | H | Can lead a claim |
| I25760 | Athscl bypass of cor art of txplt heart w unstable angina | H | Can lead a claim |
| I25761 | Athscl bypass of cor art of txplt heart w ang pctrs w spasm | H | Can lead a claim |
| I25762 | Athscl bypass of cor art of txplt hrt with refract ang pctrs | H | Can lead a claim |
| I25768 | Athscl bypass of cor art of txplt heart w oth ang pctrs | H | Can lead a claim |
| I25769 | Athscl bypass of cor art of txplt heart w unsp ang pctrs | H | Can lead a claim |
| I25790 | Atherosclerosis of CABG w unstable angina pectoris | H | Can lead a claim |
| I25791 | Atherosclerosis of CABG w angina pectoris w documented spasm | H | Can lead a claim |
| I25792 | Athscl other CABG with refractory angina pectoris | H | Can lead a claim |
| I25798 | Atherosclerosis of CABG w oth angina pectoris | H | Can lead a claim |
| I25799 | Atherosclerosis of CABG w unsp angina pectoris | H | Can lead a claim |
| I25810 | Atherosclerosis of CABG w/o angina pectoris | H | Can lead a claim |
| I25811 | Athscl native cor art of transplanted heart w/o ang pctrs | H | Can lead a claim |
| I25812 | Athscl bypass of cor art of transplanted heart w/o ang pctrs | H | Can lead a claim |
| I2582 | Chronic total occlusion of coronary artery | None | Cannot lead a claim |
| I2583 | Coronary atherosclerosis due to lipid rich plaque | None | Cannot lead a claim |
| I2584 | Coronary atherosclerosis due to calcified coronary lesion | None | Cannot lead a claim |
| I2585 | Chronic coronary microvascular dysfunction | H | Can lead a claim |
| I2589 | Other forms of chronic ischemic heart disease | H | Can lead a claim |
| I259 | Chronic ischemic heart disease, unspecified | H | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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