Acute myocardial infarction (I21) ICD-10-CM

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

• cardiac infarction
• coronary (artery) embolism
• coronary (artery) occlusion
• coronary (artery) rupture
• coronary (artery) thrombosis
• infarction of heart, myocardium, or ventricle
• myocardial infarction specified as acute or with a stated duration of 4 weeks (28 days) or less from onset

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

• code, if applicable, to identify:
• exposure to environmental tobacco smoke Z77.22
• history of tobacco dependence Z87.891
• occupational exposure to environmental tobacco smoke Z57.31
• status post administration of tPA rtPA in a different facility within the last 24 hours prior to admission to current facility Z92.82
• tobacco dependence F17
• tobacco use Z72.0

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

• old myocardial infarction I25.2
• postmyocardial infarction syndrome I24.1
• subsequent type 1 myocardial infarction I22