2018 – New Code201820192020202120222023Billable/Specific Code
- I21.9 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 I21.9 became effective on October 1, 2022.
- This is the American ICD-10-CM version of I21.9 – other international versions of ICD-10 I21.9 may differ.
ICD-10-CM I21.9 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 (acute) NOS
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 I21.9:
- myocardium, myocardial (acute) (with stated duration of 4 weeks or less) > Infarct, infarction
- transmural > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- type 1 > myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
