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Diagnosis Code

I21.29 STEMI INVOLVING OTH SITES


Code Information

Diagnosis Code: I21.29

Short Description: STEMI involving oth sites

Long Description: ST elevation (STEMI) myocardial infarction involving other sites

The code I21.29 is VALID for claim submission

Code Classification:

  • Diseases of the circulatory system (I00–I99)
    • Ischemic heart diseases (I20-I25)
      • Acute myocardial infarction (I21)
        • I21.29 STEMI involving oth sites

Code Version: 2022 ICD-10-CM


Synonyms

  • Acute myocardial infarction of lateral wall
  • Acute myocardial infarction of lateral wall
  • Acute myocardial infarction of posterolateral wall
  • Acute myocardial infarction of septum
  • Acute posterior myocardial infarction
  • Acute posterior myocardial infarction
  • Acute Q wave infarction - lateral
  • Acute Q wave myocardial infarction
  • Acute ST segment elevation myocardial infarction due to occlusion of intermediate artery
  • Acute ST segment elevation myocardial infarction of lateral wall
  • Acute ST segment elevation myocardial infarction of posterior wall
  • Acute ST segment elevation myocardial infarction of posterobasal wall
  • Acute ST segment elevation myocardial infarction of posterolateral wall
  • Acute ST segment elevation myocardial infarction of septum

Diagnostic Related Group(s)

The code I21.29 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)
  • Acute Myocardial Infarction, Discharged Alive With Mcc (280)
  • Acute Myocardial Infarction, Discharged Alive With Cc (281)
  • Acute Myocardial Infarction, Discharged Alive Without Cc/mcc (282)
  • Acute Myocardial Infarction, Expired With Mcc (283)
  • Acute Myocardial Infarction, Expired With Cc (284)
  • Acute Myocardial Infarction, Expired Without Cc/mcc (285)

References to Index of Diseases and Injuries

The code I21.29 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Acute transmural myocardial infarction of other sites
    • Apical-lateral transmural (Q wave) infarction (acute)
    • Basal-lateral transmural (Q wave) infarction (acute)
    • High lateral transmural (Q wave) infarction (acute)
    • Lateral (wall) NOS transmural (Q wave) infarction (acute)
    • Posterior (true) transmural (Q wave) infarction (acute)
    • Posterobasal transmural (Q wave) infarction (acute)
    • Posterolateral transmural (Q wave) infarction (acute)
    • Posteroseptal transmural (Q wave) infarction (acute)
    • Septal transmural (Q wave) infarction (acute) NOS

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
I21.29 Right Arrow 410.51 AMI lateral NEC, initial
410.61 True post infarct, init
410.81 AMI NEC, initial

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
I21.01 ST elevation (STEMI) myocardial infarction involving left main coronary artery
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
I21.3 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: 10/1/2023

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