What ICD-10 Codes are Used for CAD?
Coronary Artery Disease (CAD) is the narrowing or blockage of the coronary arteries, usually caused by atherosclerosis. Here are some commonly used ICD-10 codes for CAD:
- I25.10: Atherosclerotic heart disease of native coronary artery without angina pectoris. This is a generic code for CAD when the disease's severity or vessel involvement is not specified.
- I25.110: Atherosclerotic heart disease of the native coronary artery with unstable angina pectoris. This code indicates the presence of CAD with symptoms of unstable angina.
- I25.111: Atherosclerotic heart disease of the native coronary artery with angina pectoris with documented spasm. This code represents CAD with angina that involves coronary artery spasms.
- I25.118: Atherosclerotic heart disease of the native coronary artery with other forms of angina pectoris. This code is used for CAD associated with other forms of angina not categorized under stable or unstable angina.
- I25.119: Atherosclerotic heart disease of the native coronary artery with unspecified angina pectoris. This code is used when CAD is accompanied by angina, but the type of angina is not specified.
- I25.9: Chronic ischemic heart disease, unspecified. This code is used when chronic ischemic heart disease is diagnosed without further specification.
- I25.2: Old myocardial infarction. This code is used when a patient has a documented history of a heart attack.
- I25.5: Ischemic cardiomyopathy. This code is used when a heart muscle disease results from a lack of blood flow to the heart.
- I25.6: Silent myocardial ischemia. This code is used for patients showing evidence of ischemia—a lack of oxygen-rich blood—without the usual chest pain symptoms.
- I25.82: Chronic total occlusion of the coronary artery. This code is assigned for complete blockages that have been present for over three months.
- I25.9: Chronic ischemic heart disease, unspecified. This is used when the specific type of ischemic heart disease isn't specified in the documentation.
For a detailed understanding of ICD codes, watch this explainer video.

