I23Header code — not billable

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

Short description: Certain crnt comp fol STEMI & NSTEMI mocard infrc <= 28 day

Chapter
9. Diseases of the circulatory system
Category
I23
Effective date
October 1, 2026

Related codes in category I23

I23.0Hemopericardium as current complication following AMIYesI23.1Atrial septal defect as current complication following AMIYesI23.2Ventricular septal defect as current comp following AMIYesI23.3Rupture of card wall w/o hemoperic as current comp fol AMIYesI23.4Rupture of chord tendne as current comp following AMIYesI23.5Rupture of papillary muscle as current comp following AMIYesI23.6Thombos of atrium/auric append/ventr as current comp fol AMIYesI23.7Postinfarction anginaYesI23.8Oth current complications following AMIYes

Frequently asked questions

What is ICD-10 code I23?

I23 is an ICD-10-CM diagnosis 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 code?

No. I23 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is I23 in?

I23 falls under Chapter 9: Diseases of the circulatory system.

When did I23 become effective?

I23 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I23?

I23 belongs to category I23, which includes 9 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.