I20
⚠ Non-billable
Angina pectoris
ICD-10-CM · FY2026 · Diseases of the Circulatory System
Code
I20
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Circulatory System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- 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
- 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)
Frequently asked questions
What is ICD-10 code I20?
ICD-10-CM code I20 represents Angina pectoris. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Circulatory System chapter, effective October 1, 2025 – September 30, 2026.
Is I20 billable?
No. I20 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is I20 in?
I20 belongs to the Diseases of the Circulatory System chapter (I00–I99) of ICD-10-CM.
Related codes in the I20 category
I20.0
Unstable angina
Billable
I20.1
Angina pectoris with documented spasm
Billable
I20.2
Refractory angina pectoris
Billable
I20.8
Other forms of angina pectoris
Non-billable
I20.9
Angina pectoris, unspecified
Billable
I20.81
Angina pectoris with coronary microvascular dysfunction
Billable
I20.89
Other forms of angina pectoris
Billable
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