ICD-10 I23
Non-Billable HeaderCertain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)
About ICD-10-CM I23
ICD-10-CM code I23 represents Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period). This is a non-billable header code in the Circulatory System chapter (block I23). The 2026 edition of ICD-10-CM I23 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Medicare LCD Coverage for I23
Local Coverage Determinations (LCDs) from CMS MACs that list I23 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I23.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but I23 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with I23
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93000 Electrocardiogram for chest pain evaluation Internal Medicine
- 93015 Stress test for chest pain evaluation Cardiovascular Disease
- 93563 Echocardiogram for chest pain evaluation Cardiovascular Disease
- 93565 Transesophageal echocardiogram for chest pain evaluation Cardiovascular Disease
- 93501 Echocardiogram for chest pain evaluation Cardiovascular Disease
- 93598 Intravascular ultrasound for chest pain evaluation Cardiovascular Disease
- 93618 Implantable cardioverter-defibrillator for ventricular tachycardia Cardiovascular Disease
- 93750 Pacemaker insertion for bradycardia Cardiovascular Disease
- 93799 Unlisted cardiovascular procedure Cardiovascular Disease
- 93567 Transesophageal echocardiogram for chest pain evaluation Cardiovascular Disease
Codes Adjacent To I23
Other codes in section I20-I25 (Ischemic heart diseases).
ICD-10 I23, Billing FAQ
Is ICD-10 code I23 billable? +
No, I23 is a non-billable header code. Use a more specific child code from block I23 when submitting claims.
What CPT codes are commonly billed with I23? +
Procedures frequently paired with I23 include: 93000, 93015, 93563, 93565, 93501.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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