I20-I25Not billable, use a more specific code below
Ischemic heart diseases (I20-I25)
chapter 9: Diseases of the Circulatory System
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Instructional notes
Code also: add a code for this too, order depends on the encounter
- the presence of hypertension (I10-I1A)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
- Section I.C.9.b Atherosclerotic Coronary Artery Disease and Angina (page 52), covers I20-I25
Combination codes I25.11 and I25.7 include angina, so no separate angina code is needed, and a causal link is assumed unless documented otherwise. If admitted for an AMI, sequence the AMI before the coronary artery disease.
Other Chapter 9 topics:
- Hypertension (page 50)
- Intraoperative and Postprocedural Cerebrovascular Accident (page 53)
- Sequelae of Cerebrovascular Disease (page 53)
- Acute myocardial infarction (AMI) (page 54)
All codes under I20-I25
I20-I25 can't be used on a claim. Pick a billable code below; grey headings group them.
- I20Angina pectoris
- I20.0Unstable angina
- I20.1Angina pectoris with documented spasm
- I20.2Refractory angina pectoris
- I20.8Other forms of angina pectoris
- I20.81Angina pectoris with coronary microvascular dysfunction
- I20.89Other forms of angina pectoris
- I20.9Angina pectoris, unspecified
- I21Acute myocardial infarction
- I21.0ST elevation (STEMI) myocardial infarction of anterior wall
- I21.01ST elevation (STEMI) myocardial infarction involving left main coronary artery
- I21.02ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
- I21.09ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
- I21.1ST elevation (STEMI) myocardial infarction of inferior wall
- I21.11ST elevation (STEMI) myocardial infarction involving right coronary artery
- I21.19ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- I21.2ST elevation (STEMI) myocardial infarction of other sites
- I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29ST elevation (STEMI) myocardial infarction involving other sites
- I21.3ST elevation (STEMI) myocardial infarction of unspecified site
- I21.4Non-ST elevation (NSTEMI) myocardial infarction
- I21.9Acute myocardial infarction, unspecified
- I21.AOther type of myocardial infarction
- I21.A1Myocardial infarction type 2
- I21.A9Other myocardial infarction type
- I21.BMyocardial infarction with coronary microvascular dysfunction
- I22Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
- I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
- I22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
- I22.2Subsequent non-ST elevation (NSTEMI) myocardial infarction
- I22.8Subsequent ST elevation (STEMI) myocardial infarction of other sites
- I22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
- I23Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)
- I23.0Hemopericardium as current complication following acute myocardial infarction
- I23.1Atrial septal defect as current complication following acute myocardial infarction
- I23.2Ventricular septal defect as current complication following acute myocardial infarction
- I23.3Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
- I23.4Rupture of chordae tendineae as current complication following acute myocardial infarction
- I23.5Rupture of papillary muscle as current complication following acute myocardial infarction
- I23.6Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
- I23.7Postinfarction angina
- I23.8Other current complications following acute myocardial infarction
- I24Other acute ischemic heart diseases
- I24.0Acute coronary thrombosis not resulting in myocardial infarction
- I24.1Dressler's syndrome
- I24.8Other forms of acute ischemic heart disease
- I24.81Acute coronary microvascular dysfunction
- I24.89Other forms of acute ischemic heart disease
- I24.9Acute ischemic heart disease, unspecified
- I25Chronic ischemic heart disease
- I25.1Atherosclerotic heart disease of native coronary artery
- I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris
- I25.11Atherosclerotic heart disease of native coronary artery with angina pectoris
- I25.110Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
- I25.111Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
- I25.112Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
- I25.118Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
- I25.119Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
- I25.2Old myocardial infarction
- I25.3Aneurysm of heart
- I25.4Coronary artery aneurysm and dissection
- I25.41Coronary artery aneurysm
- I25.42Coronary artery dissection
- I25.5Ischemic cardiomyopathy
- I25.6Silent myocardial ischemia
- I25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
- I25.70Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris
- I25.700Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris
- I25.701Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm
- I25.702Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris
- I25.708Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris
- I25.709Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris
- I25.71Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris
- I25.710Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris
- I25.711Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.712Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris
- I25.718Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris
- I25.719Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris
- I25.72Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris
- I25.720Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris
- I25.721Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.722Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris
- I25.728Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris
- I25.729Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris
- I25.73Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris
- I25.730Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
- I25.731Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.732Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris
- I25.738Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris
- I25.739Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris
- I25.75Atherosclerosis of native coronary artery of transplanted heart with angina pectoris
- I25.750Atherosclerosis of native coronary artery of transplanted heart with unstable angina
- I25.751Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm
- I25.752Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris
- I25.758Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris
- I25.759Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris
- I25.76Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris
- I25.760Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina
- I25.761Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm
- I25.762Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris
- I25.768Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris
- I25.769Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris
- I25.79Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris
- I25.790Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
- I25.791Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm
- I25.792Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris
- I25.798Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris
- I25.799Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
- I25.8Other forms of chronic ischemic heart disease
- I25.81Atherosclerosis of other coronary vessels without angina pectoris
- I25.810Atherosclerosis of coronary artery bypass graft(s) without angina pectoris
- I25.811Atherosclerosis of native coronary artery of transplanted heart without angina pectoris
- I25.812Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris
- I25.82Chronic total occlusion of coronary artery
- I25.83Coronary atherosclerosis due to lipid rich plaque
- I25.84Coronary atherosclerosis due to calcified coronary lesion
- I25.85Chronic coronary microvascular dysfunction
- I25.89Other forms of chronic ischemic heart disease
- I25.9Chronic ischemic heart disease, unspecified
I20-I25 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Angina
Angina is chest pain or discomfort you feel when there is not enough blood flow to your heart muscle. Your heart muscle needs the oxygen that the blood carries. Angina may feel like pressure or a squeezing pain in your chest. It may feel like indigestion. You may also feel pain in your shoulders, arms, neck, jaw, or back.
Read more about angina on MedlinePlus