ST elevation (STEMI) myocardial infarction of unsp site

ST elevation (STEMI) myocardial infarction of unspecified site

📋Clinical Description

This code signifies a heart attack characterized by ST-segment elevation on an electrocardiogram (ECG), indicating a complete blockage of a coronary artery. The specific location of the myocardial infarction within the heart is not documented or is unknown.

🎯When to Use

Apply this code when documentation confirms an acute ST-elevation myocardial infarction (STEMI) but the physician record does not specify the affected coronary artery or myocardial wall. This is often used in initial presentations or when diagnostic workup is incomplete regarding the precise anatomical site.

💡Coding Tips

Only use this code when the site of the STEMI is truly unspecified; avoid using it if the site can be determined from other documentation.
Always sequence this code as the principal diagnosis for an acute STEMI encounter.
Do not confuse with non-ST elevation myocardial infarction (NSTEMI) codes (I21.4) or subsequent myocardial infarction codes (I22.-).

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Clinical Notes

Inclusion Terms

Acute transmural myocardial infarction of unspecified site
Transmural (Q wave) myocardial infarction NOS
Type 1 ST elevation myocardial infarction of unspecified site

Code Hierarchy

▲I21Acute myocardial infarction

I21.3(current)

Crosswalks

410.91ApproxICD-9 410.91ApproxICD-9 410.92ApproxICD-9 410.90ApproxICD-9

Same Category

I21Acute myocardial infarction I21.0ST elevation (STEMI) myocardial infarction of anterior wall