AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 4; ICD-10-CM New/Revised Codes

Non-Ischemic Myocardial Injury

Code I5A, Non-ischemic myocardial injury (non-traumatic), has been created to identify a non-traumatic, non-ischemic myocardial injury. The definition of a non-ischemic myocardial infarction (MI) was most recently updated in 2018.According to the Fourth Universal Definition of Myocardial Infarction, an acute myocardial injury is characterized by the rise and/or fall of cardiac troponin levels with at least one value above the 99th percentile upper reference limit. A diagnosis of MI is reserved for patients with myocardial ischemia as the cause of myocardial injury, whether attributable to acute atherothrombosis (type 1 MI) or supply/demand mismatch without acute atherothrombosis (type 2...

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