Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
- I22.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- Short description: Subsequent STEMI of unsp site
- The 2025 edition of ICD-10-CM I22.9 became effective on October 1, 2024.
- This is the American ICD-10-CM version of I22.9 – other international versions of ICD-10 I22.9 may differ.
Applicable To
- Subsequent acute myocardial infarction of unspecified site
- Subsequent myocardial infarction (acute) NOS
The following code(s) above I22.9 contain annotation back-references
that may be applicable to I22.9:
- I00-I99 Diseases of the circulatory system
- I20-I25 Ischemic heart diseases
- I22 Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction
Approximate Synonyms
- Subseq st elevation mi, within 4 wks of previous mi
- Subsequent heart attack, within 4 weeks of previous heart attack
- Subsequent st elevation myocardial infarction, within 4 weeks of previous myocardial infarction
- Subsequent st segment elevation myocardial infarction
ICD-10-CM I22.9 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 I22.9 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 I22.9:
- Infarct, infarction
- myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9
- ST elevation (STEMI) I21.3
- subsequent I22.9
- subsequent (recurrent) (reinfarction) I22.9
- ST elevation I22.9
- transmural I22.9
- type 1 I22.9 – see also Infarction, myocardial, subsequent, by site, or by ST elevation or non-ST elevation
- ST elevation (STEMI) I21.3
- myocardium, myocardial (acute) (with stated duration of 4 weeks or less) I21.9