Old myocardial infarction

This code signifies a healed myocardial infarction (heart attack) where there is evidence of previous myocardial necrosis, but the acute event has resolved. It indicates a permanent change in the heart muscle due to a past ischemic event, without current acute symptoms or active myocardial injury.

Use this code when diagnostic studies (e.g., EKG, echocardiogram, cardiac MRI) confirm a prior myocardial infarction, and the patient is not experiencing an acute event. Documentation should clearly state "old MI," "healed MI," or "history of MI" with supporting objective findings.

• Do not use this code for an acute or subacute myocardial infarction; refer to the appropriate acute MI codes.
• This code is often sequenced after codes for current cardiac conditions or complications related to the old MI.
• Ensure documentation differentiates between an old MI and a personal history of MI (V12.53), which is used when there is no current clinical evidence of the old MI.