2018 – New Code201820192020202120222023Billable/Specific Code
- I21.A1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2023 edition of ICD-10-CM I21.A1 became effective on October 1, 2022.
- This is the American ICD-10-CM version of I21.A1 – other international versions of ICD-10 I21.A1 may differ.
ICD-10-CM I21.A1 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
- Myocardial infarction due to demand ischemia
- Myocardial infarction secondary to ischemic imbalance
Code History
- 2018 (effective 10/1/2017): New code
- 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
Diagnosis Index entries containing back-references to I21.A1:
- due to > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- demand ischemia > due to I21.A1
- ischemic imbalance > due to I21.A1
- secondary to > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- demand ischemia > secondary to I21.A1
- ischemic imbalance > secondary to I21.A1
- type 2 > subsequent (recurrent) (reinfarction) I22.9
- type 2 > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- with myocardial infarction > demand (coronary) I24.8
- resulting in myocardial infarction > demand (coronary) I24.8