2025 ICD-10-CM Diagnosis Code I20.9

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Angina pectoris, unspecified

  • I20.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM I20.9 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of I20.9 – other international versions of ICD-10 I20.9 may differ.

Applicable To

  • Angina NOS
  • Anginal syndrome
  • Cardiac angina
  • Ischemic chest pain

The following code(s) above I20.9 contain annotation back-references

 that may be applicable to I20.9:

  • I00-I99  Diseases of the circulatory system
  • I20-I25  Ischemic heart diseases
  • I20  Angina pectoris

Approximate Synonyms

  • Angina
  • Angina pectoris
  • Angina pectoris (chest pain)
  • Cardiac syndrome x
  • History of myocardial infarction with stable angina
  • Stable angina
  • Stable angina with history of attack

Clinical Information

  • A disorder characterized by substernal discomfort due to insufficient myocardial oxygenation.
  • A heart condition marked by paroxysms of chest pain due to reduced oxygen to the heart.
  • Angina is chest pain or discomfort you get when your heart muscle does not get enough blood. It 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, unstable and variant. 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.not all chest pain or discomfort is angina. If you have chest pain, you should see your health care provider.
  • Chest pain caused by coronary heart disease
  • Previous or current symptoms described as chest pain or pressure, jaw pain, arm pain, or other equivalent discomfort suggestive of cardiac ischemia.
  • Previous or current symptoms described as chest pain or pressure, jaw pain, arm pain, or other equivalent discomfort suggestive of cardiac ischemia. (nih roadmap cardiovascular data standards working group)
  • Recurring thoracic pain or discomfort which occurs when a part of the heart does not receive enough blood; usually caused by exertion or excitement.
  • The symptom of paroxysmal pain consequent to myocardial ischemia usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the myocardium exceed that supplied by the coronary circulation.

ICD-10-CM I20.9 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 311 Angina pectoris

Convert I20.9 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Code annotations containing back-references to I20.9:

Diagnosis Index entries containing back-references to I20.9:

  • Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) I20.9
  • Pain(s) R52 – see also Painful
    • chest (central) R07.9
      • ischemic I20.9
  • Status (post) – see also Presence (of)
    • anginosus I20.9
  • Syndrome – see also Disease
    • X I20.9
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