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  2. ICD-10-CM Codes List
  3. I00–I99
  4. I20-I25
  5. Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (I22)

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

The ICD-10 code I22 and its subcodes categorize subsequent heart attacks, specifically following an earlier myocardial infarction. These codes distinguish between ST elevation myocardial infarctions (STEMI) and non-ST elevation myocardial infarctions (NSTEMI) occurring after an initial event.

The codes under I22 are used to document a repeat heart attack in different heart regions. For example, I22.0 and I22.1 indicate subsequent STEMIs affecting the anterior or inferior walls of the heart, respectively, while I22.2 denotes a subsequent NSTEMI. Other subcodes like I22.8 and I22.9 capture STEMIs at other or unspecified sites. These distinctions help medical coders accurately identify and classify recurrent myocardial infarctions, facilitating precise coding for patient records and treatment outcomes. Recognizing terms such as "subsequent ST segment elevation myocardial infarction" or "subsequent non-ST segment elevation myocardial infarction" aligns these common synonyms with the official ICD-10 code I22 series for subsequent myocardial infarctions.

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