U.S. ICD-10-CM · FY 2027

I20 ICD-10-CM Code: Angina pectoris

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I20

Angina pectoris

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I20 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Ischemic heart diseases (I20-I25)

  3. 3

    Category I20

    Angina pectoris

  4. 4

    Code I20

    Angina pectoris

More specific choices

Codes under I20

I20 is a non-billable category. Choose the child code that best matches the documented diagnosis.

I20.0

Unstable angina

I20.1

Angina pectoris with documented spasm

I20.2

Refractory angina pectoris

I20.8

Other forms of angina pectoris

I20.9

Angina pectoris, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I20.

Code first

No “code first” instruction is listed for I20.

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)

Excludes1

Conditions that should not be reported together with this code.

  • 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)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for I20.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I20 mean?

I20 is the FY 2027 U.S. ICD-10-CM code for “Angina pectoris.”

Is I20 a billable or specific ICD-10-CM code?

No. I20 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is I20 located in ICD-10-CM?

I20 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Ischemic heart diseases (I20-I25) (I20–I25), under category I20, Angina pectoris.

What coding notes are listed for I20?

No inclusion terms are listed for I20 in this reference record. No code-first instruction is listed. Additional-code instructions: 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). Excludes1 notes: 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). No Excludes2 note is listed.

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