2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I25.2 is a billable ICD-10-CM diagnosis code for old myocardial infarction. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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.

I25.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 188 for payment year 2027.

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 the other POA exempt codes in Ischemic heart diseases (I20-I25).

Medicare Risk Adjustment (HCC)Billing

I25.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 188 — Coronary Artery Disease
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

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 following coronary artery bypass graft
  • History of myocardial infarction following percutaneous coronary intervention
  • History of myocardial infarction in last eight weeks
  • History of non-ST segment elevation myocardial infarction
  • History of subsequent myocardial infarction due to demand ischemia
  • History of subsequent myocardial infarction following percutaneous coronary intervention
  • History of subsequent non-ST segment elevation myocardial infarction
  • History of subsequent 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I25.2: its own notes plus those printed at I25, block I20-I25, and Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From I25 Chronic ischemic heart disease applies to 56 codes
  • non-ischemic myocardial injury (I5A)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From I25 Chronic ischemic heart disease applies to 56 codes
  • 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)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From Block I20-I25 Ischemic heart diseases applies to 94 codes
  • the presence of hypertension (I10-I1A)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I25.2, its category, or a range that includes it.

Excludes2 4

These codes carry an Excludes2 note naming I25.2: its condition is not part of those codes, and both may be reported when the patient has both.

  • I21 Acute myocardial infarction
    old myocardial infarction (I25.2)
  • Z86.7 Personal history of diseases of the circulatory system
    old myocardial infarction (I25.2)
  • I74 Arterial embolism and thrombosis
    coronary embolism and thrombosis (I21-I25) names I21-I25, which includes this code
  • I82 Other venous embolism and thrombosis
    coronary (I21-I25) names I21-I25, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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.

Patient EducationClinical

Heart Attack

A heart attack, also called a myocardial infarction, is a type of heart disease. It 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.

The full article covers:

  • What is a heart attack?
  • What heart attack risk factors can be changed?
  • What heart attack risk factors can't be changed?
  • What causes a heart attack?
  • What are the symptoms of a heart attack?
  • How is a heart attack diagnosed?
  • What is the treatment for a heart attack?

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I25.2Overview

What is the ICD-10 code for old myocardial infarction?

The ICD-10-CM code for old myocardial infarction is I25.2 (sometimes written as I252). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 0.6610 to 1.1993 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. The code appears in the Ischemic heart diseases (I20-I25) range of the CMS exempt list.

Does I25.2 need an additional code?

When the condition applies, yes. The Use Additional Code note at I25, which applies to I25.2, reads: 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.-); and 1 more listed in the Instructional Notes section. The additional code is reported after I25.2.

Does I25.2 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: I25.2 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 188 (Coronary Artery Disease).