ICD-10 Diagnosis Code I20.1

Angina pectoris with documented spasm

Diagnosis Code I20.1

ICD-10: I20.1
Short Description: Angina pectoris with documented spasm
Long Description: Angina pectoris with documented spasm
This is the 2017 version of the ICD-10-CM diagnosis code I20.1

Code Classification
  • Diseases of the circulatory system
    • Ischemic heart diseases (I20-I25)
      • Angina pectoris (I20)

Information for Patients


Angina is chest pain or discomfort you feel when there is not enough blood flow to your heart muscle. Your heart muscle needs the oxygen that the blood carries. Angina may feel like pressure or a squeezing pain in your chest. It may feel like indigestion. You may also feel pain in your shoulders, arms, neck, jaw, or back.

Angina is a symptom of coronary artery disease (CAD), the most common heart disease. CAD happens when a sticky substance called plaque builds up in the arteries that supply blood to the heart, reducing blood flow.

There are three types of angina:

  • Stable angina is the most common type. It happens when the heart is working harder than usual. Stable angina has a regular pattern. Rest and medicines usually help.
  • Unstable angina is the most dangerous. It does not follow a pattern and can happen without physical exertion. It does not go away with rest or medicine. It is a sign that you could have a heart attack soon.
  • Variant angina is rare. It happens when you are resting. Medicines can help.

Not all chest pain or discomfort is angina. If you have chest pain, you should see your health care provider.

NIH: National Heart, Lung, and Blood Institute

  • Angina - discharge
  • Angina - when you have chest pain
  • Coronary angiography
  • Electrocardiogram
  • Living with heart disease and angina
  • Stable angina
  • Unstable angina

[Read More]
Previous Code
Previous Code I20.0
Next Code
I20.8 Next Code