Pericardial Effusion ICD-10-CM Codes

Learn about the pericardial effusion ICD-10-CM codes you can use through this guide.

By Matt Olivares on May 21, 2025.

Fact Checked by Karina Jimenea.

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Pericardial Effusion ICD-10-CM Codes

What ICD-10 codes are used for pericardial effusion?

Pericardial effusion, a condition where excess fluid accumulates in the pericardial sac around the heart, has distinct ICD-10 codes for accurate diagnosis and treatment. Here are the commonly used pericardial effusion ICD codes:

  • I31.3 - Pericardial effusion (noninflammatory): This used to be the primary code to use for cases of noninflammatory pericardial effusion, but this code is no longer valid and billable.
  • I31.31 - Malignant pericardial effusion in diseases classified elsewhere: This is meant to be used when it's confirmed that a patient has a malignant pericardial effusion.
  • I30.9 - Acute pericarditis, unspecified: This is meant to be used when it's confirmed that a patient has acute pericarditis, which means their pericardium is inflamed. It causes chest pains, among other symptoms.
  • I31.4 - Cardiac tamponade: This is characterized as a serious medical emergency due to abnormal fluid buildup in the pericardial sac. This causes the sac to press against the heart, which can lead to cardiac shock.
  • I31.8 - Other specified diseases of pericardium: This can be used for other cases of pericardial effusion that don't have specific codes.
  • I31.9 - Disease of pericardium, unspecified: This can be used for pericardium problems in general, but once the problem has been identified/specified, please use a different code.

Which pericardial effusion ICD codes are billable?

All of the aforementioned pericardial effusion ICD codes, except for I31.3, are valid and billable.

Clinical information

Pericardial effusion is the accumulation of excess fluid between the layers of the pericardial sac surrounding the heart. Here's what you need to know:

  • It can result from inflammation, injury, or other conditions affecting the heart.
  • Symptoms may include chest pain, shortness of breath, fatigue, and rapid heartbeat.
  • The condition can lead to cardiac tamponade, a life-threatening situation where the fluid compresses the heart.
  • Diagnosis often involves imaging tests like echocardiograms or CT scans.
  • Treatment may include medications, pericardiocentesis (removal of fluid), or surgery.

Synonyms include

  • Fluid around the heart
  • Cardiac effusion
  • Pericardial fluid accumulation
  • Heart sac fluid buildup
  • Pericardial sac fluid excess
  • Acute myocardial infarction due to pericardial effusion
  • Postcardiotomy syndrome with pericardial effusion
  • Nonrheumatic mitral valve disease accompanied by pericardial effusion

Popular search terms for pericardial effusion ICD-10-CM codes

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Frequently asked questions

What causes pericardial effusion?

Pericardial effusion can be caused by inflammation, injury, infections, heart surgery, or other conditions affecting the heart.

Is pericardial effusion life-threatening?

While mild pericardial effusion might not be dangerous, severe cases can lead to cardiac tamponade, a life-threatening condition where the accumulated fluid compresses the heart.

How is pericardial effusion treated?

Treatment for pericardial effusion depends on its cause and severity. It may include medications, pericardiocentesis to remove the fluid, or surgical procedures.

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