ICD-10 I20
Non-Billable HeaderAngina pectoris
About ICD-10-CM I20
ICD-10-CM code I20 represents Angina pectoris. This is a non-billable header code in the Circulatory System chapter (block I20). The 2026 edition of ICD-10-CM I20 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.
Type 1 Excludes
Pure excludes, these codes can never be coded together with I20. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- angina pectoris with atherosclerotic heart disease of native coronary arteries (I25.1-)
- atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7-)
- postinfarction angina (I23.7)
Use Additional Code
When coding I20, also report these additional codes when applicable.
- code to identify:
- exposure to environmental tobacco smoke (Z77.22)
- history of tobacco dependence (Z87.891)
- occupational exposure to environmental tobacco smoke (Z57.31)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Medicare LCD Coverage for I20
Local Coverage Determinations (LCDs) from CMS MACs that list I20 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 I20.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but I20 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with I20
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 I20
Other codes in section I20-I25 (Ischemic heart diseases).
ICD-10 I20, Billing FAQ
Is ICD-10 code I20 billable? +
No, I20 is a non-billable header code. Use a more specific child code from block I20 when submitting claims.
What codes are Type 1 Excludes for I20? +
Type 1 Excludes (never code together with I20): angina pectoris with atherosclerotic heart disease of native coronary arteries (I25.1-); atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris (I25.7-); postinfarction angina (I23.7)
What CPT codes are commonly billed with I20? +
Procedures frequently paired with I20 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 1, 2026.
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