I25
⚠ Non-billable (Header)Chronic ischemic heart disease
Diseases of the circulatory system (I00-I99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
⚠️ Excludes2
directBoth codes can exist if both conditions are documented.
- • non-ischemic myocardial injury (I5A)
📋 Code Instructions
direct- • 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)
Child Codes (9)
Clinical Description
ICD-10-CM code I25 represents chronic ischemic heart disease. This code falls under the Diseases of the circulatory system (I00-I99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.
Frequently Asked Questions
What is ICD-10 code I25?
ICD-10-CM code I25 is "Chronic ischemic heart disease". It belongs to the category: Diseases of the circulatory system (I00-I99).
Is I25 a billable ICD-10 code?
No, I25 is a non-billable header code. A more specific child code must be used for billing.
Can I25 be coded with other codes?
I25 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)