2026 ICD-10-CM Diagnosis Code I25.2Old myocardial infarction

ICD-10-CM Codes›I00–I99›I20-I25›I25

ICD-10-CM I25.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I25.2 is a billable ICD-10-CM diagnosis code for old myocardial infarction. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 302 through 303. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coronary atherosclerosis and other heart disease.

This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such selected atherosclerosis, ischemia, and infarction.

Code Identity

ICD-10-CM Code
I25.2
Billable Status
Yes — Valid for Submission
Code Describes
Old myocardial infarction
Short Description
Old myocardial infarction
Same as the full description in the CMS dataset.
Parent Code
I25
Chronic ischemic heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI20-I25Ischemic heart diseases
CategoryI25Chronic ischemic heart disease
This CodeI25.2Old myocardial infarction

Present on Admission (POA)Billing

I25.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Coronary arteriosclerosis in patient with history of previous myocardial infarction
  • EKG: myocardial infarction
  • EKG: old myocardial infarction
  • H/O: myocardial infarct at greater than 60
  • H/O: myocardial infarct at less than 60
  • H/O: Myocardial infarction in last year
  • History of myocardial infarction
  • History of myocardial infarction due to atherothrombotic coronary artery disease
  • History of myocardial infarction due to demand ischemia
  • History of myocardial infarction in last eight weeks
  • History of non-ST segment elevation myocardial infarction
  • Myocardial ischemia manifest on stress test status post myocardial infarction
  • Old anterior myocardial infarction
  • Old infarct of high lateral wall of myocardium
  • Old infarct of myocardium of anterolateral region
  • Old infarct of myocardium of apex of heart
  • Old infarct of myocardium of posterolateral region
  • Old infarct of myocardium of ventricular septum
  • Old inferior myocardial infarction
  • Old inferolateral myocardial infarction
  • Old lateral myocardial infarction
  • Old myocardial infarction
  • Old posterior myocardial infarction
  • Past myocardial infarction diagnosed on ECG AND/OR other special investigation, but currently presenting no symptoms
  • Recent myocardial infarction

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Healed myocardial infarction
  • Past myocardial infarction diagnosed by ECG or other investigation, but currently presenting no symptoms

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • History
      • personal (of)
        • myocardial infarction (old)
    • Infarct, infarction
      • myocardium, myocardial (acute) (with stated duration of 4 weeks or less)
        • diagnosed on ECG, but presenting no symptoms
    • Infarct, infarction
      • myocardium, myocardial (acute) (with stated duration of 4 weeks or less)
        • healed or old
    • Infarct, infarction
      • myocardium, myocardial (acute) (with stated duration of 4 weeks or less)
        • past (diagnosed on ECG or other investigation, but currently presenting no symptoms)
    • Occlusion, occluded
      • artery
        • coronary (acute) (thrombotic) (without myocardial infarction)
          • healed or old
    • Occlusion, occluded
      • coronary (artery) (vein) (thrombotic)
        • healed or old
    • Old(previous) myocardial infarction
    • Scar, scarring
      • myocardium, myocardial

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR011
Coronary atherosclerosis and other heart disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Old Myocardial Infarction

    documented history of previous myocardial infarction (mi), typically with objective evidence via positive biomarkers of myocardial necrosis.

  • Old Myocardial Infarction by ECG Finding|OLD OR AGE INDETERMINATE WALL MYOCARDIAL INFARCTION|Old Myocardial Infarction by EKG Finding|Old Or Age Indeterminate Wall Myocardial Infarction

    an electrocardiographic finding of pathologic q waves, which is suggestive of myocardial infarction of one or more regions of the heart, without evidence of current or ongoing acute infarction. no specification is provided for localization. (cdisc)

Patient EducationClinical

Heart Attack

Each year almost 800,000 Americans have a heart attack. A heart attack happens when blood flow to the heart suddenly becomes blocked. Without the blood coming in, the heart can't get oxygen. If not treated quickly, the heart muscle begins to die.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I25.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
412 Old myocardial infarct
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I25.2Overview

Is I25.2 (Chronic ischemic heart disease) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report old myocardial infarction on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I25.2 group to?

When old myocardial infarction is the principal diagnosis on an inpatient stay, it groups to MS-DRG 302, 303, with relative weights from 0.6732 to 1.1966 depending on complications. Higher weights mean higher Medicare reimbursement.

Is I25.2 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for old myocardial infarction on inpatient claims.

What is the ICD-9 equivalent of I25.2?

Under the General Equivalence Mappings, old myocardial infarction converts to ICD-9-CM 412 (old myocardial infarct). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.