ICD-10-CM · Chapter 9 · I00–I99
I21.4
Non-ST elevation (NSTEMI) myocardial infarction
Diseases of the circulatory system
Quick facts
- Code
- I21.4
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 9 — Diseases of the circulatory system
- Category
- I21 — Acute myocardial infarction
- Specificity
- 4 characters
How coders use this code
ICD-10-CM I21.4 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of non-st elevation (nstemi) myocardial infarction. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in I21
- I21Acute myocardial infarction
- I21.0ST elevation (STEMI) myocardial infarction of anterior wall
- I21.01ST elevation (STEMI) myocardial infarction involving left main coronary artery
- I21.02ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
- I21.09ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
- I21.1ST elevation (STEMI) myocardial infarction of inferior wall
- I21.11ST elevation (STEMI) myocardial infarction involving right coronary artery
- I21.19ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- I21.2ST elevation (STEMI) myocardial infarction of other sites
- I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29ST elevation (STEMI) myocardial infarction involving other sites
- I21.3ST elevation (STEMI) myocardial infarction of unspecified site
- I21.9Acute myocardial infarction, unspecified
- I21.AOther type of myocardial infarction
- I21.A1Myocardial infarction type 2
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