I25
⚠ Non-billable
Chronic ischemic heart disease
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I25
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes2 — not included here, but may code together
- non-ischemic myocardial injury (I5A)
Use additional code
- 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)
Frequently asked questions
What is ICD-10 code I25?
ICD-10-CM code I25 represents Chronic ischemic heart disease. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I25 billable?
No. I25 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is I25 in?
I25 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I25 category
I25.1
Atherosclerotic heart disease of native coronary artery
Non-billable
I25.2
Old myocardial infarction
Billable
I25.3
Aneurysm of heart
Billable
I25.4
Coronary artery aneurysm and dissection
Non-billable
I25.5
Ischemic cardiomyopathy
Billable
I25.6
Silent myocardial ischemia
Billable
I25.7
Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris
Non-billable
I25.10
Atherosclerotic heart disease of native coronary artery without angina pectoris
Billable
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