| I21 | Acute myocardial infarction | NON-BILLABLE CODE |
| I21.0 | ST elevation (STEMI) myocardial infarction of anterior wall | NON-BILLABLE CODE |
| I21.01 | ST elevation (STEMI) myocardial infarction involving left main coronary artery | BILLABLE CODE |
| I21.02 | ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery | BILLABLE CODE |
| I21.09 | ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall | BILLABLE CODE |
| I21.1 | ST elevation (STEMI) myocardial infarction of inferior wall | NON-BILLABLE CODE |
| I21.11 | ST elevation (STEMI) myocardial infarction involving right coronary artery | BILLABLE CODE |
| I21.19 | ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall | BILLABLE CODE |
| I21.2 | ST elevation (STEMI) myocardial infarction of other sites | NON-BILLABLE CODE |
| I21.21 | ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery | BILLABLE CODE |
| I21.29 | ST elevation (STEMI) myocardial infarction involving other sites | BILLABLE CODE |
| I21.3 | ST elevation (STEMI) myocardial infarction of unspecified site | BILLABLE CODE |
| I21.9 | Acute myocardial infarction, unspecified | BILLABLE CODE |
| I21.A | Other type of myocardial infarction | NON-BILLABLE CODE |
| I21.A1 | Myocardial infarction type 2 | BILLABLE CODE |
| I21.A9 | Other myocardial infarction type | BILLABLE CODE |
| I21.B | Myocardial infarction with coronary microvascular dysfunction | BILLABLE CODE |
