STEMI involving left circumflex coronary artery

This code signifies a specific type of heart attack, an ST-elevation myocardial infarction (STEMI), where there is complete blockage of the left circumflex coronary artery. This blockage leads to myocardial tissue death in the area supplied by this artery.

Apply this code when documentation clearly indicates an acute STEMI with the left circumflex artery identified as the culprit vessel. This diagnosis is typically confirmed by characteristic ECG changes (ST elevation), elevated cardiac biomarkers, and often angiographic findings.

• Ensure documentation explicitly states "STEMI" and identifies the "left circumflex coronary artery" as the affected vessel.
• Distinguish from non-ST elevation myocardial infarction (NSTEMI) and other types of STEMI affecting different coronary arteries.
• Sequence as the principal diagnosis when it is the primary reason for the encounter, followed by any associated conditions or complications.