I21.01 STEMI INVOLVING LEFT MAIN CORONARY ARTERY

Code Information

  • Diagnosis Code: I21.01
  • Short Description: STEMI involving left main coronary artery
  • Long Description: ST elevation (STEMI) myocardial infarction involving left main coronary artery
  • Code Version: 2025 ICD-10-CM

The code I21.01 is VALID for claim submission

Code Classification

Synonyms

  • Acute ST segment elevation myocardial infarction due to left coronary artery occlusion

Diagnostic Related Group(s)

The code I21.01 is grouped in the following Diagnostic Related Group(s) MS-DRG V43.0

  1. Acute Myocardial Infarction, Discharged Alive With Mcc (280)
  2. Acute Myocardial Infarction, Discharged Alive With Cc (281)
  3. Acute Myocardial Infarction, Discharged Alive Without Cc/mcc (282)
  4. Acute Myocardial Infarction, Expired With Mcc (283)
  5. Acute Myocardial Infarction, Expired With Cc (284)
  6. Acute Myocardial Infarction, Expired Without Cc/mcc (285)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
I21.01 Right Arrow 410.11 AMI anterior wall, init
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
I21 Acute myocardial infarction
I21.0 ST elevation (STEMI) myocardial infarction of anterior wall
I21.02 ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
I21.09 ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
I21.1 ST elevation (STEMI) myocardial infarction of inferior wall
I21.11 ST elevation (STEMI) myocardial infarction involving right coronary artery
I21.19 ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
I21.2 ST elevation (STEMI) myocardial infarction of other sites
I21.21 ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
I21.29 ST elevation (STEMI) myocardial infarction involving other sites
I21.3 ST elevation (STEMI) myocardial infarction of unspecified site
I21.4 Non-ST elevation (NSTEMI) myocardial infarction
I21.9 Acute myocardial infarction, unspecified
I21.A Other type of myocardial infarction
I21.A1 Myocardial infarction type 2
I21.A9 Other myocardial infarction type
I21.B Myocardial infarction with coronary microvascular dysfunction
This page was last updated on: 10/1/2025
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