Subsequent STEMI of anterior wall

This code signifies a patient experiencing a second or subsequent ST elevation myocardial infarction (STEMI) that specifically affects the anterior wall of the heart. This indicates a new acute ischemic event occurring after a previous myocardial infarction, with characteristic ECG findings of ST elevation.

Apply this code when documentation clearly states a "subsequent" or "recurrent" STEMI, localized to the anterior wall. This diagnosis is supported by ECG evidence of ST elevation and elevated cardiac biomarkers in a patient with a history of a prior MI.

• Ensure documentation specifies "subsequent" MI; otherwise, an initial MI code (I21.-) may be more appropriate.
• Verify the anatomical site (anterior wall) is clearly documented.
• Sequence this code after any acute complications directly related to the MI.