U.S. ICD-10-CM · FY 2027

I25 ICD-10-CM Code: Chronic ischemic heart disease

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I25

Chronic ischemic heart disease

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I25 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Ischemic heart diseases (I20-I25)

  3. 3

    Category I25

    Chronic ischemic heart disease

  4. 4

    Code I25

    Chronic ischemic heart disease

More specific choices

Codes under I25

I25 is a non-billable category. Choose the child code that best matches the documented diagnosis.

I25.1

Atherosclerotic heart disease of native coronary artery

I25.2

Old myocardial infarction

I25.3

Aneurysm of heart

I25.4

Coronary artery aneurysm and dissection

I25.5

Ischemic cardiomyopathy

I25.6

Silent myocardial ischemia

I25.7

Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris

I25.8

Other forms of chronic ischemic heart disease

I25.9

Chronic ischemic heart disease, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I25.

Code first

No “code first” instruction is listed for I25.

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)

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for I25.

Excludes2

Conditions not included here that may be reported separately when present.

  • non-ischemic myocardial injury (I5A)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I25 mean?

I25 is the FY 2027 U.S. ICD-10-CM code for “Chronic ischemic heart disease.”

Is I25 a billable or specific ICD-10-CM code?

No. I25 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is I25 located in ICD-10-CM?

I25 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Ischemic heart diseases (I20-I25) (I20–I25), under category I25, Chronic ischemic heart disease.

What coding notes are listed for I25?

No inclusion terms are listed for I25 in this reference record. No code-first instruction is listed. Additional-code instructions: 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). No Excludes1 note is listed. Excludes2 notes: non-ischemic myocardial injury (I5A).

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