Try for free

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.

Official description

I25

Chronic ischemic heart disease

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

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

Codes under I25

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

I25.1Atherosclerotic heart disease of native coronary arteryI25.2Old myocardial infarctionI25.3Aneurysm of heartI25.4Coronary artery aneurysm and dissectionI25.5Ischemic cardiomyopathyI25.6Silent myocardial ischemiaI25.7Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectorisI25.8Other forms of chronic ischemic heart diseaseI25.9Chronic ischemic heart disease, unspecified

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)

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

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

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).