Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (I22)

Browse all the diagnosis codes used for subsequent st elevation (stemi) and non-st elevation (nstemi) myocardial infarction (i22). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

Instructional Notations

Includes

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

• acute myocardial infarction occurring within four weeks (28 days) of a previous acute myocardial infarction, regardless of site
• cardiac infarction
• coronary (artery) embolism
• coronary (artery) occlusion
• coronary (artery) rupture
• coronary (artery) thrombosis
• infarction of heart, myocardium, or ventricle
• recurrent myocardial infarction
• reinfarction of myocardium
• rupture of heart, myocardium, or ventricle
• subsequent type 1 myocardial infarction

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 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

• subsequent myocardial infarction, type 2 I21.A1
• subsequent myocardial infarction of other type type 3 type 4 type 5 I21.A9