1. Home
  2. ICD-10-CM Codes List
  3. I00–I99
  4. Ischemic heart diseases (I20-I25)

Ischemic heart diseases (I20-I25)

Browse all the diagnosis codes used for ischemic heart diseases (i20-i25). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Instructional Notations

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

  • the presence of hypertension I10 I1A

  • Diseases of the circulatory system (I00–I99)

    • Ischemic heart diseases (I20-I25)

        • Angina pectoris (I20)

        • I20 Angina pectoris
        • I20.0 Unstable angina
        • I20.1 Angina pectoris with documented spasm
        • I20.2 Refractory angina pectoris
        • I20.8 Other forms of angina pectoris NEW CODE
        • I20.81 Angina pectoris with coronary microvascular dysfunction NEW CODE
        • I20.89 Other forms of angina pectoris NEW CODE
        • I20.9 Angina pectoris, unspecified

        • Acute myocardial infarction (I21)

        • I21 Acute myocardial infarction
        • I21.0 ST elevation (STEMI) myocardial infarction of anterior wall
        • I21.01 ST elevation (STEMI) myocardial infarction involving left main coronary artery
        • I21.02 ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
        • I21.09 ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
        • I21.1 ST elevation (STEMI) myocardial infarction of inferior wall
        • I21.11 ST elevation (STEMI) myocardial infarction involving right coronary artery
        • I21.19 ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
        • I21.2 ST elevation (STEMI) myocardial infarction of other sites
        • I21.21 ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
        • I21.29 ST elevation (STEMI) myocardial infarction involving other sites
        • I21.3 ST elevation (STEMI) myocardial infarction of unspecified site
        • I21.4 Non-ST elevation (NSTEMI) myocardial infarction
        • I21.9 Acute myocardial infarction, unspecified
        • I21.A Other type of myocardial infarction
        • I21.A1 Myocardial infarction type 2
        • I21.A9 Other myocardial infarction type
        • I21.B Myocardial infarction with coronary microvascular dysfunction NEW CODE

        • Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period) (I23)

        • I23 Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)
        • I23.0 Hemopericardium as current complication following acute myocardial infarction
        • I23.1 Atrial septal defect as current complication following acute myocardial infarction
        • I23.2 Ventricular septal defect as current complication following acute myocardial infarction
        • I23.3 Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
        • I23.4 Rupture of chordae tendineae as current complication following acute myocardial infarction
        • I23.5 Rupture of papillary muscle as current complication following acute myocardial infarction
        • I23.6 Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
        • I23.7 Postinfarction angina
        • I23.8 Other current complications following acute myocardial infarction

        • Other acute ischemic heart diseases (I24)

        • I24 Other acute ischemic heart diseases
        • I24.0 Acute coronary thrombosis not resulting in myocardial infarction
        • I24.1 Dressler's syndrome
        • I24.8 Other forms of acute ischemic heart disease NEW CODE
        • I24.81 Acute coronary microvascular dysfunction NEW CODE
        • I24.89 Other forms of acute ischemic heart disease NEW CODE
        • I24.9 Acute ischemic heart disease, unspecified

        • Chronic ischemic heart disease (I25)

        • I25 Chronic ischemic heart disease
        • I25.1 Atherosclerotic heart disease of native coronary artery
        • I25.10 Atherosclerotic heart disease of native coronary artery without angina pectoris
        • I25.11 Atherosclerotic heart disease of native coronary artery with angina pectoris
        • I25.110 Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
        • I25.111 Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
        • I25.112 Atherosclerotic heart disease of native coronary artery with refractory angina pectoris UPDATED CODE
        • I25.118 Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
        • I25.119 Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
        • I25.2 Old myocardial infarction
        • I25.3 Aneurysm of heart
        • I25.4 Coronary artery aneurysm and dissection
        • I25.41 Coronary artery aneurysm
        • I25.42 Coronary artery dissection
        • I25.5 Ischemic cardiomyopathy
        • I25.6 Silent myocardial ischemia
        • 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 pectoris
        • I25.701 Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
        • I25.702 Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris
        • I25.708 Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris
        • I25.709 Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris
        • 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 pectoris
        • I25.711 Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
        • I25.712 Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris
        • I25.718 Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris
        • I25.719 Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris
        • 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 pectoris
        • I25.721 Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
        • I25.722 Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris
        • I25.728 Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris
        • I25.729 Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris
        • 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 pectoris
        • I25.731 Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
        • I25.732 Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris
        • I25.738 Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris
        • I25.739 Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris
        • 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 angina
        • I25.751 Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm
        • I25.752 Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris
        • I25.758 Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris
        • I25.759 Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris
        • 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 angina
        • I25.761 Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm
        • I25.762 Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris
        • I25.768 Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris
        • I25.769 Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris
        • 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 pectoris
        • I25.791 Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm
        • I25.792 Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris
        • I25.798 Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris
        • I25.799 Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
        • 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 pectoris
        • I25.811 Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
        • I25.812 Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
        • I25.82 Chronic total occlusion of coronary artery
        • I25.83 Coronary atherosclerosis due to lipid rich plaque
        • I25.84 Coronary atherosclerosis due to calcified coronary lesion
        • I25.85 Chronic coronary microvascular dysfunction NEW CODE
        • I25.89 Other forms of chronic ischemic heart disease
        • I25.9 Chronic ischemic heart disease, unspecified