I20.0Billable

Unstable angina

Chapter
9. Diseases of the circulatory system
Category
I20
Effective date
October 1, 2026

Related codes in category I20

I20Angina pectorisI20.1Angina pectoris with documented spasmYesI20.2Refractory angina pectorisYesI20.8Other forms of angina pectorisI20.81Angina pectoris with coronary microvascular dysfunctionYesI20.89Other forms of angina pectorisYesI20.9Angina pectoris, unspecifiedYes

Frequently asked questions

What is ICD-10 code I20.0?

I20.0 is an ICD-10-CM diagnosis code for Unstable angina.

Is I20.0 a billable code?

Yes. I20.0 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is I20.0 in?

I20.0 falls under Chapter 9: Diseases of the circulatory system.

When did I20.0 become effective?

I20.0 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to I20.0?

I20.0 belongs to category I20, which includes 7 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.