I20Header code — not billable

Angina pectoris

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

Related codes in category I20

I20.0Unstable anginaYesI20.1Angina 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?

I20 is an ICD-10-CM diagnosis code for Angina pectoris.

Is I20 a billable code?

No. I20 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is I20 in?

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

When did I20 become effective?

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

What other codes are related to I20?

I20 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.