2024
ICD-10-CM
Diagnosis
Code

I21.4 Non-ST elevation (NSTEMI) myocardial infarction

  • Billable
  • 2016–2024

I21.4 is a billable/specific diagnosis code from the 2024 ICD-10-CM used to classify the following condition: Non-ST elevation (NSTEMI) myocardial infarction.

Inclusion term

  • Acute subendocardial myocardial infarction

  • Non-Q wave myocardial infarction NOS

  • Nontransmural myocardial infarction NOS

  • Type 1 non-ST elevation myocardial infarction

Versions

  1. 2024

    No changes

  2. 2023

    No changes

  3. 2022

    No changes

  4. 2021

    No changes

  5. 2020

    No changes

  6. 2019

    No changes

  7. 2018

    Code changed

    • Inclusion term

        • Acute subendocardial myocardial infarction
        • Non-Q wave myocardial infarction NOS
        • Nontransmural myocardial infarction NOS
        • Acute subendocardial myocardial infarction
        • Non-Q wave myocardial infarction NOS
        • Nontransmural myocardial infarction NOS
        • Type 1 non-ST elevation myocardial infarction

  8. 2017

    No changes

  9. 2016

    New code