ICD-10-CM > I00-I99 > I20-I25 > I21 > I21.A > I21.A1 I21.A1 Myocardial infarction type 2 Billable/Specific Copy Code Copy Description Applicable To Myocardial infarction due to demand ischemiaMyocardial infarction secondary to ischemic imbalance Code First , if applicable, the underlying cause, such as:anemia (D50.0-D64.9)chronic obstructive pulmonary disease (J44.-)paroxysmal tachycardia (I47.0-I47.9)shock (R57.0-R57.9)