ICD-10-CM 2027
ICD-10 code for old myocardial infarction
From the official ICD-10-CM alphabetic index entry “Old (previous) myocardial infarction”. Page updated September 29, 2026.
About coding old myocardial infarction
The ICD-10-CM code for old myocardial infarction is I25.2 (Old myocardial infarction).
Within I25 (chronic ischemic heart disease), I25.2 is specifically for old myocardial infarction. Related codes cover Atherosclerotic heart disease of native coronary artery (I25.1), aneurysm of heart (I25.3), coronary artery aneurysm and dissection (I25.4), ischemic cardiomyopathy (I25.5), Silent myocardial ischemia (I25.6), atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7), other forms of chronic ischemic heart disease (I25.8) and unspecified (I25.9).
Use an additional code to identify: chronic total occlusion of coronary artery (I25.82), exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about old myocardial infarction ICD-10 codes
What is the ICD-10 code for old myocardial infarction?
- I25.2 — Old myocardial infarction.
Is I25.2 billable?
- Yes. I25.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I25.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I25.2 as a principal diagnosis.
Is I25.2 a CC or MCC?
- No. I25.2 is neither a CC nor an MCC under MS-DRG v44.0.