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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Ischemic Heart Disease 410-414 > 2008 ICD-9-CM Diagnosis 412 Old myocardial infarction  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 412 can be accessed here. 412 is a specific code that can be used to specify a diagnosis 412 contains 17 index entries 412 also known as: Healed myocardial infarction Past myocardial infarction diagnosed on ECG [EKG] or other special investigation, but currently presenting no symptoms Index entries containing 412: Disease, diseased - see also Syndrome heart (organic) 429.9 ischemic (chronic) (see also Ischemia, heart) 414.9 asymptomatic 412 diagnosed on ECG or other special investigation but currently presenting no symptoms 412 History (personal) of cardiovascular disease V12.50 myocardial infarction 412 circulatory system disease V12.50 myocardial infarction 412 myocardial infarction 412 Infarct, infarction myocardium, myocardial (acute or with a stated duration of 8 weeks or less) (with hypertension) 410.9 diagnosed on ECG, but presenting no symptoms 412 healed or old, currently presenting no symptoms 412 past (diagnosed on ECG or other special investigation, but currently presenting no symptoms) 412 with symptoms NEC 414.8 previous, currently presenting no symptoms 412 Occlusion artery NEC (see also Embolism, artery) 444.9 coronary (thrombotic) (see also Infarct, myocardium) 410.9 healed or old 412 coronary (artery) (thrombotic) (see also Infarct, myocardium) 410.9 healed or old 412 Scar, scarring (see also Cicatrix) 709.2 myocardium, myocardial 412 Thrombosis, thrombotic (marantic) (multiple) (progressive) (vein) (vessel) 453.9 artery, arteries (postinfectional) 444.9 coronary (see also Infarct, myocardium) 410.9 healed or specified as old 412 cardiac (see also Infarct, myocardium) 410.9 healed or specified as old 412 coronary (artery) (see also Infarct, myocardium) 410.9 healed or specified as old 412 intramural (see also Infarct, myocardium) 410.9 healed or specified as old 412 mural (heart chamber) (see also Infarct, myocardium) 410.9 healed or specified as old 412