2016201720182019202020212022202320242025Billable/Specific Code
- I21.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM I21.4 became effective on October 1, 2022.
- This is the American ICD-10-CM version of I21.4 – other international versions of ICD-10 I21.4 may differ.
ICD-10-CM I21.4 is grouped within Diagnostic Related Group(s):
- 222 Cardiac defibrillator implant with cardiac catheterization with ami, hf or shock with mcc
- 223 Cardiac defibrillator implant with cardiac catheterization with ami, hf or shock without mcc
- 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
Applicable To
- Acute subendocardial myocardial infarction
- Non-Q wave myocardial infarction NOS
- Nontransmural myocardial infarction NOS
- Type 1 non-ST elevation myocardial infarction
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2016 (effective 10/1/2015): No change
- 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 I21.4:
- non-Q wave > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- non-ST elevation (NSTEMI) > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- nontransmural > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- nontransmural > Infarct, infarction
- subendocardial (acute) (nontransmural) > Infarct, infarction
- subendocardial (acute) > Necrosis, necrotic (ischemic)