U.S. ICD-10-CM · FY 2027

I23 ICD-10-CM Code: Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

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

Code definition

Official description

I23

Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

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

Classification

Where I23 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Ischemic heart diseases (I20-I25)

  3. 3

    Category I23

    Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

  4. 4

    Code I23

    Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

More specific choices

Codes under I23

I23 is a non-billable category. Choose the child code that best matches the documented diagnosis.

I23.0

Hemopericardium as current complication following acute myocardial infarction

I23.1

Atrial septal defect as current complication following acute myocardial infarction

I23.2

Ventricular septal defect as current complication following acute myocardial infarction

I23.3

Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction

I23.4

Rupture of chordae tendineae as current complication following acute myocardial infarction

I23.5

Rupture of papillary muscle as current complication following acute myocardial infarction

I23.6

Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction

I23.7

Postinfarction angina

I23.8

Other current complications following acute myocardial infarction

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I23.

Code first

No “code first” instruction is listed for I23.

Use additional code

No “use additional code” instruction is listed for I23.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for I23.

Excludes2

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

No Excludes2 note is listed for I23.

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 I23 mean?

I23 is the FY 2027 U.S. ICD-10-CM code for “Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period).”

Is I23 a billable or specific ICD-10-CM code?

No. I23 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 I23 located in ICD-10-CM?

I23 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Ischemic heart diseases (I20-I25) (I20–I25), under category I23, Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period).

What coding notes are listed for I23?

No inclusion terms are listed for I23 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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