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I25

Non-billable

Chronic ischemic heart disease

I25 is the ICD-10-CM code for Chronic ischemic heart disease. It is a non-billable category code — use a more specific child code such as I25.1 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
9
Edition
FY2026

I00-I99 Diseases of the circulatory system

What this means — in plain language

MedlinePlus · NIH

What is atherosclerosis? Atherosclerosis is a condition in which plaque builds up inside your arteries. Plaque is a sticky substance made up of cholesterol , fat, blood cells, calcium, and other substances found in the blood. Over time, plaque hardens and causes your arteries to narrow. That limits the flow of oxygen-rich blood to your body. Some people may confuse atherosclerosis and arteriosclerosis, but they are…

Read more about Atherosclerosis at MedlinePlus ↗
Coronary Artery Disease ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes2 — not included here

  • •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)

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
Coronary artery diseaseCardiomyopathyAtherosclerosisCoronary Artery Bypass Surgery

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code I25?
I25 is the ICD-10-CM code for "Chronic ischemic heart disease". It falls under I00-I99 Diseases of the circulatory system.
Is I25 a billable code?
No — I25 is a non-billable header code. Use a more specific child code (such as I25.1) for billing.
What are the subcodes of I25?
I25 has 9 more specific child codes, including I25.1, I25.2, I25.3.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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