2022 ICD-10-CM Code I23

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

Version 2021

Not Valid for Submission

ICD-10:I23
Short Description:Certain crnt comp fol STEMI & NSTEMI mocard infrc <= 28 day
Long Description:Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Ischemic heart diseases (I20-I25)
      • Certain crnt comp fol STEMI & NSTEMI mocard infrc <= 28 day (I23)

I23 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of certain current complications following st elevation (stemi) and non-st elevation (nstemi) myocardial infarction (within the 28 day period). The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Certain crnt comp fol STEMI & NSTEMI mocard infrc <= 28 day

Non-specific codes like I23 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for certain crnt comp fol stemi & nstemi mocard infrc <= 28 day:

  • BILLABLE CODE - Use I23.0 for Hemopericardium as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.1 for Atrial septal defect as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.2 for Ventricular septal defect as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.3 for Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.4 for Rupture of chordae tendineae as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.5 for Rupture of papillary muscle as current complication following acute myocardial infarction
  • BILLABLE CODE - Use I23.6 for Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
  • BILLABLE CODE - Use I23.7 for Postinfarction angina
  • BILLABLE CODE - Use I23.8 for Other current complications following acute myocardial infarction

Information for Patients


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. But if you do get quick treatment, you may be able to prevent or limit damage to the heart muscle. That's why it's important to know the symptoms of a heart attack and call 911 if you or someone else is having them. You should call, even if you are not sure that it is a heart attack.

The most common symptoms in men and women are

You may also have other symptoms, such as nausea, vomiting, dizziness, and lightheadedness. You may break out in a cold sweat. Sometimes women will have different symptoms then men. For example, they are more likely to feel tired for no reason.

The most common cause of heart attacks is coronary artery disease (CAD). With CAD, there is a buildup of cholesterol and other material, called plaque, on their inner walls or the arteries. This is atherosclerosis. It can build up for years. Eventually an area of plaque can rupture (break open). A blood clot can form around the plaque and block the artery.

A less common cause of heart attack is a severe spasm (tightening) of a coronary artery. The spasm cuts off blood flow through the artery.

At the hospital, health care providers make a diagnosis based on your symptoms, blood tests, and different heart health tests. Treatments may include medicines and medical procedures such as coronary angioplasty. After a heart attack, cardiac rehabilitation and lifestyle changes can help you recover.

NIH: National Heart, Lung, and Blood Institute


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)