ICD-10 · PDGM grouping
I25 Chronic ischemic heart disease
All 56 codes in the I25 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.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
56
Can lead a claim
52
Cannot lead a claim
4
What CMS assigns to I25
52 of the 56 codes group to MMTA - Cardiac and Circulatory; 4 are assigned no clinical group. Comorbidity subgroups: 43 toward Atherosclerotic Heart Disease with Angina; 8 toward Chronic Ischemic Heart Disease; 2 toward Aneurysm of Heart/Coronary Artery; 1 toward Other Heart Diseases; 2 are assigned none. 52 of the 56 can lead a claim. CMS attaches a code-first note to 3 of the 56.
- Atherosclerotic Heart Disease with Angina: can award the low comorbidity tier as a secondary diagnosis.
- Chronic Ischemic Heart Disease: counts toward the high comorbidity tier only in an interaction pair.
- Aneurysm of Heart/Coronary Artery
- Other Heart Diseases: counts toward the high comorbidity tier only in an interaction pair.
Code first
CMS grouper convention 63, on I25.82, I25.83, I25.84. Code first:
- coronary atherosclerosis (I25.1-, I25.7-, I25.81-)
Every code in I25
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 |
|---|---|---|---|---|
| I25.1 Atherosclerotic heart disease of native coronary artery | ||||
| I25.10 | Atherosclerotic heart disease of native coronary artery without angina pectorisCMS: Athscl heart disease of native coronary artery w/o ang pctrs | Can lead a claim | H | Other Heart Diseases |
| I25.11 Atherosclerotic heart disease of native coronary artery with angina pectoris | ||||
| I25.110 | Atherosclerotic heart disease of native coronary artery with unstable angina pectorisCMS: Athscl heart disease of native cor art w unstable ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.111 | Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasmCMS: Athscl heart disease of native cor art w ang pctrs w spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.112 | Atherosclerotic heart disease of native coronary artery with refractory angina pectorisCMS: Athscl heart dis of native cor art with refract ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.118 | Atherosclerotic heart disease of native coronary artery with other forms of angina pectorisCMS: Athscl heart disease of native cor art w oth ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.119 | Atherosclerotic heart disease of native coronary artery with unspecified angina pectorisCMS: Athscl heart disease of native cor art w unsp ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.2 | Old myocardial infarction | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| I25.3 | Aneurysm of heart | Can lead a claim | H | Aneurysm of Heart/Coronary Artery |
| I25.4 Coronary artery aneurysm and dissection | ||||
| I25.41 | Coronary artery aneurysm | Can lead a claim | H | Aneurysm of Heart/Coronary Artery |
| I25.42 | Coronary artery dissection | Can lead a claim | H | None |
| I25.5 | Ischemic cardiomyopathy | Can lead a claim | H | Chronic Ischemic Heart Disease |
| I25.6 | Silent myocardial ischemia | Can lead a claim | H | Chronic Ischemic Heart Disease |
| I25.7 Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris | ||||
| I25.70 Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris | ||||
| I25.700 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectorisCMS: Atherosclerosis of CABG, unsp, w unstable angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.701 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasmCMS: Athscl CABG, unsp, w angina pectoris w documented spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.702 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectorisCMS: Athscl CABG, unspecified, with refractory angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.708 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectorisCMS: Atherosclerosis of CABG, unsp, w oth angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.709 | Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectorisCMS: Atherosclerosis of CABG, unsp, w unsp angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.71 Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris | ||||
| I25.710 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectorisCMS: Athscl autologous vein CABG w unstable angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.711 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasmCMS: Athscl autologous vein CABG w ang pctrs w documented spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.712 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectorisCMS: Athscl autologous vein CABG with refractory angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.718 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectorisCMS: Athscl autologous vein CABG w oth angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.719 | Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectorisCMS: Athscl autologous vein CABG w unsp angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.72 Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris | ||||
| I25.720 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectorisCMS: Athscl autologous artery CABG w unstable angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.721 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasmCMS: Athscl autologous artery CABG w ang pctrs w documented spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.722 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectorisCMS: Athscl autologous artery CABG with refractory ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.728 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectorisCMS: Athscl autologous artery CABG w oth angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.729 | Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectorisCMS: Athscl autologous artery CABG w unsp angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.73 Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris | ||||
| I25.730 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectorisCMS: Athscl nonautologous biological CABG w unstable ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.731 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasmCMS: Athscl nonaut biological CABG w ang pctrs w documented spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.732 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectorisCMS: Athscl nonaut biological CABG with refractory ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.738 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectorisCMS: Athscl nonautologous biological CABG w oth angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.739 | Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectorisCMS: Athscl nonautologous biological CABG w unsp angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.75 Atherosclerosis of native coronary artery of transplanted heart with angina pectoris | ||||
| I25.750 | Atherosclerosis of native coronary artery of transplanted heart with unstable anginaCMS: Athscl native cor art of txplt heart w unstable angina | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.751 | Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasmCMS: Athscl native cor art of txplt heart w ang pctrs w spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.752 | Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectorisCMS: Athscl native cor art of txplt heart with refract ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.758 | Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectorisCMS: Athscl native cor art of transplanted heart w oth ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.759 | Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectorisCMS: Athscl native cor art of transplanted heart w unsp ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.76 Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris | ||||
| I25.760 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable anginaCMS: Athscl bypass of cor art of txplt heart w unstable angina | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.761 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasmCMS: Athscl bypass of cor art of txplt heart w ang pctrs w spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.762 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectorisCMS: Athscl bypass of cor art of txplt hrt with refract ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.768 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectorisCMS: Athscl bypass of cor art of txplt heart w oth ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.769 | Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectorisCMS: Athscl bypass of cor art of txplt heart w unsp ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.79 Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris | ||||
| I25.790 | Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectorisCMS: Atherosclerosis of CABG w unstable angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.791 | Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasmCMS: Atherosclerosis of CABG w angina pectoris w documented spasm | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.792 | Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectorisCMS: Athscl other CABG with refractory angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.798 | Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectorisCMS: Atherosclerosis of CABG w oth angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.799 | Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectorisCMS: Atherosclerosis of CABG w unsp angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.8 Other forms of chronic ischemic heart disease | ||||
| I25.81 Atherosclerosis of other coronary vessels without angina pectoris | ||||
| I25.810 | Atherosclerosis of coronary artery bypass graft(s) without angina pectorisCMS: Atherosclerosis of CABG w/o angina pectoris | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.811 | Atherosclerosis of native coronary artery of transplanted heart without angina pectorisCMS: Athscl native cor art of transplanted heart w/o ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.812 | Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectorisCMS: Athscl bypass of cor art of transplanted heart w/o ang pctrs | Can lead a claim | H | Atherosclerotic Heart Disease with Angina |
| I25.82 | Chronic total occlusion of coronary artery | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | Chronic Ischemic Heart Disease |
| I25.83 | Coronary atherosclerosis due to lipid rich plaque | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | Chronic Ischemic Heart Disease |
| I25.84 | Coronary atherosclerosis due to calcified coronary lesion | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | Chronic Ischemic Heart Disease |
| I25.85 | Chronic coronary microvascular dysfunction | Can lead a claim | H | Chronic Ischemic Heart Disease |
| I25.89 | Other forms of chronic ischemic heart disease | Can lead a claim | H | Chronic Ischemic Heart Disease |
| I25.9 | Chronic ischemic heart disease, unspecified | Can lead a claim | H | Chronic Ischemic Heart Disease |
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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