2025 ICD-10-CM Diagnosis Code I21.29

by

ST elevation (STEMI) myocardial infarction involving other sites

  • I21.29 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: STEMI involving oth sites
  • The 2025 edition of ICD-10-CM I21.29 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I21.29 – other international versions of ICD-10 I21.29 may differ.

Applicable To

  • 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

The following code(s) above I21.29 contain annotation back-references

 that may be applicable to I21.29:

  • I00-I99  Diseases of the circulatory system
  • I20-I25  Ischemic heart diseases
  • I21  Acute myocardial infarction
  • I21.2  ST elevation (STEMI) myocardial infarction of other sites

Approximate Synonyms

  • Acute heart attack, atrium
  • Acute heart attack, lateral wall
  • Acute heart attack, left coronary artery
  • Acute heart attack, posterior wall
  • Acute heart attack, posterobasal wall
  • Acute heart attack, posterolateral wall
  • Acute heart attack, septum
  • Acute myocardial infarction of atrium
  • Acute myocardial infarction of lateral wall
  • Acute myocardial infarction of posterobasal wall
  • Acute myocardial infarction of posterolateral wall
  • Acute myocardial infarction of septum
  • Acute st segment elevation myocardial infarction due to left coronary artery occlusion
  • Acute st segment elevation myocardial infarction of atrium
  • Acute st segment elevation myocardial infarction of lateral wall
  • Acute st segment elevation myocardial infarction of left coronary artery
  • 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
  • Heart attack, acute, lateral wall
  • Myocardial infarction (heart attack)
  • Rupture of interventricular septum
  • True posterior myocardial infarction

ICD-10-CM I21.29 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 280 Acute myocardial infarction, discharged alive with mcc
  • 281 Acute myocardial infarction, discharged alive with cc
  • 282 Acute myocardial infarction, discharged alive without cc/mcc
  • 283 Acute myocardial infarction, expired with mcc
  • 284 Acute myocardial infarction, expired with cc
  • 285 Acute myocardial infarction, expired without cc/mcc

Convert I21.29 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I21.29:

error: Content is protected !!