ICD-10-CM Diagnosis Code (2025)
Official Description for I25
Chronic ischemic heart disease
Coding Notes & Guidelines for I25
unstable angina without atherosclerotic heart disease (I20.0)
angina pectoris with documented spasm without atherosclerotic heart disease (I20.1)
other forms of angina pectoris without atherosclerotic heart disease (I20.8-)
unspecified angina pectoris without atherosclerotic heart disease (I20.9)
congenital coronary (artery) aneurysm (Q24.5)
- atherosclerosis of bypass graft(s) of transplanted heart without angina pectoris (I25.812)
- atherosclerosis of coronary artery bypass graft(s) without angina pectoris (I25.810)
- atherosclerosis of native coronary artery of transplanted heart without angina pectoris (I25.811)
unstable angina pectoris without atherosclerosis of coronary artery bypass graft (I20.0)
angina pectoris with documented spasm without atherosclerosis of coronary artery bypass graft (I20.1)
other forms of angina pectoris without atherosclerosis of coronary artery bypass graft (I20.8-)
unspecified angina pectoris without atherosclerosis of coronary artery bypass graft (I20.9)
unstable angina without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.0)
angina pectoris with documented spasm without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.1)
other forms of angina pectoris without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.8-)
unspecified angina pectoris without atherosclerosis of autologous vein coronary artery bypass graft(s) (I20.9)
unstable angina without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.0)
angina pectoris with documented spasm without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.1)
other forms of angina pectoris without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.8-)
unspecified angina pectoris without atherosclerosis of autologous artery coronary artery bypass graft(s) (I20.9)
unstable angina without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.0)
angina pectoris with documented spasm without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.1)
other forms of angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.8-)
unspecified angina pectoris without atherosclerosis of nonautologous biological coronary artery bypass graft(s) (I20.9)
atherosclerosis of native coronary artery of transplanted heart without angina pectoris (I25.811)
atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris (I25.812)
unstable angina without atherosclerosis of other coronary artery bypass graft(s) (I20.0)
angina pectoris with documented spasm without atherosclerosis of other coronary artery bypass graft(s) (I20.1)
other forms of angina pectoris without atherosclerosis of other coronary artery bypass graft(s) (I20.8-)
unspecified angina pectoris without atherosclerosis of other coronary artery bypass graft(s) (I20.9)
atherosclerosis of coronary bypass graft(s) with angina pectoris (I25.70-I25.73-, I25.79-)
atherosclerosis of native coronary artery of transplanted heart with angina pectoris (I25.75-)
atherosclerosis of bypass graft of transplanted heart with angina pectoris (I25.76)
- acute coronary occlusion with myocardial infarction (I21.0-I21.B, I22.-)
- acute coronary occlusion without myocardial infarction (I24.0)
non-ischemic myocardial injury (I5A)
- atheroembolism (I75.-)
- atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-)
coronary atherosclerosis (I25.1-, I25.7-)
embolism or thrombus of coronary artery bypass graft(s) (T82.8-)
atherosclerotic heart disease of native coronary artery without angina pectoris (I25.10)
coronary atherosclerosis (I25.1-, I25.7-, I25.81-)
coronary atherosclerosis (I25.1-, I25.7-, I25.81-)
coronary atherosclerosis (I25.1-, I25.7-, I25.81-)
- code to identify:
- chronic total occlusion of coronary artery (I25.82)
- exposure to environmental tobacco smoke (Z77.22)
- history of tobacco dependence (Z87.891)
- occupational exposure to environmental tobacco smoke (Z57.31)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
- code, if applicable, to identify:
- coronary atherosclerosis due to calcified coronary lesion (I25.84)
- coronary atherosclerosis due to lipid rich plaque (I25.83)
- code, if applicable, to identify:
- coronary atherosclerosis due to calcified coronary lesion (I25.84)
- coronary atherosclerosis due to lipid rich plaque (I25.83)
- code, if applicable, to identify:
- coronary atherosclerosis due to calcified coronary lesion (I25.84)
- coronary atherosclerosis due to lipid rich plaque (I25.83)
- Atherosclerotic cardiovascular disease
- Coronary (artery) atheroma
- Coronary (artery) atherosclerosis
- Coronary (artery) disease
- Coronary (artery) sclerosis
Atherosclerotic heart disease NOS
- Atherosclerotic heart disease with angina NOS
- Atherosclerotic heart disease with ischemic chest pain
- Healed myocardial infarction
- Past myocardial infarction diagnosed by ECG or other investigation, but currently presenting no symptoms
- Mural aneurysm
- Ventricular aneurysm
Coronary arteriovenous fistula, acquired
Atherosclerosis of internal mammary artery graft with angina pectoris
Atherosclerosis of coronary artery bypass graft NOS
Atherosclerosis of native coronary artery of transplanted heart NOS
Atherosclerosis of bypass graft of transplanted heart NOS
- Complete occlusion of coronary artery
- Total occlusion of coronary artery
Coronary atherosclerosis due to severely calcified coronary lesion
- Chronic (presentation of) coronary microvascular disease
- Coronary microvascular dysfunction NOS
Ischemic heart disease (chronic) NOS
Child Codes (More Specific Codes for I25):
About ICD-10-CM Code I25 (Chronic ischemic heart disease)
ICD-10-CM code I25 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I25 became effective on October 1, 2024.
This page provides detailed information about I25 - Chronic ischemic heart disease. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Chronic ischemic heart disease.