ICD-10-CM I20: Angina pectoris

ICD-10-CM Diagnosis Code (2025)

Official Description for I20

Angina pectoris

Coding Notes & Guidelines for I20

Excludes1: Not Coded Here
  • 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)
Use Additional Code

code(s) for symptoms associated with angina equivalent

Inclusion Terms
  • Accelerated angina
  • Crescendo angina
  • De novo effort angina
  • Intermediate coronary syndrome
  • Preinfarction syndrome
  • Worsening effort angina
Inclusion Terms
  • Angiospastic angina
  • Prinzmetal angina
  • Spasm-induced angina
  • Variant angina
Inclusion Terms

Angina pectoris with coronary microvascular disease

Inclusion Terms
  • Angina equivalent
  • Angina of effort
  • Coronary slow flow syndrome
  • Stable angina
  • Stenocardia
Inclusion Terms
  • Angina NOS
  • Anginal syndrome
  • Cardiac angina
  • Ischemic chest pain

Child Codes (More Specific Codes for I20):

I20.0 - Unstable angina I20.1 - Angina pectoris with documented spasm I20.2 - Refractory angina pectoris I20.8 - Other forms of angina pectoris I20.81 - Angina pectoris with coronary microvascular dysfunction I20.89 - Other forms of angina pectoris I20.9 - Angina pectoris, unspecified

About ICD-10-CM Code I20 (Angina pectoris)

ICD-10-CM code I20 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I20 became effective on October 1, 2024.

This page provides detailed information about I20 - Angina pectoris. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Angina pectoris.