STEMI involving oth coronary artery of inferior wall

ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall

📋Clinical Description

This diagnosis code signifies an acute heart attack characterized by ST-segment elevation on an electrocardiogram, specifically affecting the inferior wall of the heart due to an occlusion in a coronary artery other than the left circumflex. This indicates a severe and urgent form of myocardial infarction requiring immediate intervention.

🎯When to Use

Apply this code when documentation explicitly states an ST-elevation myocardial infarction (STEMI) of the inferior wall, and the culprit vessel is identified as a coronary artery other than the left circumflex. This typically involves occlusion of the right coronary artery (RCA) or a dominant left anterior descending (LAD) artery supplying the inferior wall.

💡Coding Tips

Differentiate carefully between inferior wall STEMI caused by the left circumflex artery (I21.21) and other coronary arteries.
Ensure documentation specifies "inferior wall" and "STEMI" to support this code.
Sequence this code as the primary diagnosis for an acute STEMI episode.

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Clinical Notes

Inclusion Terms

Acute transmural myocardial infarction of inferior wall
Inferolateral transmural (Q wave) infarction (acute)
Transmural (Q wave) infarction (acute) (of) diaphragmatic wall
Transmural (Q wave) infarction (acute) (of) inferior (wall) NOS

Excludes 2 — Not included here

ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery (I21.21)

Code Hierarchy

▲I21.1ST elevation (STEMI) myocardial infarction of inferior wall

I21.19(current)

Crosswalks

410.21ApproxICD-9 410.40ApproxICD-9 410.22ApproxICD-9 410.41ApproxICD-9 410.20ApproxICD-9 410.41ApproxICD-9