I21.3

Applicable To

• Acute transmural myocardial infarction of unspecified site

• Transmural Q wave) myocardial infarction NOS

• Type 1 ST elevation myocardial infarction of unspecified site

Approximate Synonyms

• Acute heart attack

• Acute myocardial infarction

• Acute myocardial infarction due to occlusion of left coronary artery

• Acute st segment elevation myocardial infarction

• Atrial septal defect after acute heart attack

• Atrial septal defect as current complication following acute myocardial infarction

• Chordae tendineae rupture after acute heart attack

• Heart attack, acute

• Heart attack, less than 8 weeks ago

• Hemopericardium after acute heart attack

• Hemopericardium as current complication following acute myocardial infarction

• History of myocardial infarction less than 4 weeks ago

• Hx of mi, < 8 weeks

• Mi acute st segment elevation

• Mural thrombus of heart, following heart attack

• Myocardial infarction heart attack)

• Myocardial infarction heart attack), < 4weeks

• Post-infarction mural thrombus

• Rupture of chordae tendinae as current complication following acute myocardial infarction

• Rupture of interventricular septum

• Rupture of interventricular septum following acute myocardial infarction

• Rupture of papillary muscle as current complication following acute myocardial infarction

• Rupture papillary muscle complicating acute heart attack

• Subsequent heart attack, anterior wall, within 4 weeks of previous heart attack

• Subsequent heart attack, anterolateral wall, within 4 weeks of previous heart attack

• Subsequent heart attack, inferior wall, within 4 weeks of previous heart attack

• Subsequent heart attack, inferolateral wall, within 4 weeks of previous heart attack

• Subsequent heart attack, inferoposterior wall, within 4 weeks of previous heart attack

• Subsequent heart attack, posterior wall, within 4 weeks of previous heart attack

• Subsequent heart attack, posterolateral wall, within 4 weeks of previous heart attack

• Subsequent heart attack, within 4 weeks of previous heart attack

• Subsequent non-st elevation myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation anterior wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation anterolateral wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation inferior wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation inferolateral wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation inferoposterior wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation posterior wall myocardial infarction, within 4 weeks of previous myocardial infarction

• Subsequent st elevation posterolateral wall myocardial infarction, within 4 weeks of previous myocardial infarction

Clinical Information

• Necrosis of the myocardium, as a result of interruption of the blood supply to the area. It is characterized by a severe and rapid onset of symptoms that may include chest pain, often radiating to the left arm and left side of the neck, dyspnea, sweating, and palpitations.

Details

• I21.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• Short description: ST elevation (STEMI) myocardial infarction of unsp site

• The 2023 edition of ICD-10-CM I21.3 became effective on October 1, 2022.

• This is the American ICD-10-CM version of I21.3 – other international versions of ICD-10 I21.3 may differ.