Codes / ICD10CM / I27.24

I27.24 Chronic thromboembolic pulmonary hypertension

ICD10CM code

ICD10CM

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Name of the Condition

  • Chronic Thromboembolic Pulmonary Hypertension

Summary

Chronic thromboembolic pulmonary hypertension (CTEPH) is a form of pulmonary hypertension caused by persistent obstruction of the pulmonary arteries due to organized blood clots. This condition increases pressure in the pulmonary vasculature, placing strain on the right side of the heart and potentially leading to reduced cardiac function over time.

Causes

CTEPH results from unresolved blood clots in the pulmonary arteries, which may develop after a pulmonary embolism. The clots organize and adhere to the vessel walls, creating chronic obstruction that impairs blood flow and raises pulmonary arterial pressure.

Risk Factors

  • History of acute pulmonary embolism or deep vein thrombosis
  • Inadequate anticoagulation after a thrombotic event
  • Prolonged immobility or surgery
  • Underlying thrombophilia (e.g., genetic clotting disorders)
  • Prior lung or heart conditions affecting vascular health

Symptoms

  • Progressive shortness of breath, especially during activity
  • Fatigue and weakness
  • Swelling in the ankles or legs (edema)
  • Chest discomfort or pressure
  • Rapid or irregular heartbeat
  • Dizziness or fainting episodes

Diagnosis

Diagnosis involves a combination of clinical evaluation, imaging studies (e.g., ventilation-perfusion scan or CT pulmonary angiography), and right heart catheterization to confirm elevated pulmonary artery pressure. Additional tests may assess clot burden and rule out other causes of pulmonary hypertension.

Treatment Options

Treatment may include pulmonary endarterectomy (surgical removal of clots), balloon pulmonary angioplasty, or targeted therapies to manage pulmonary hypertension. Anticoagulation is typically continued to prevent further clot formation.

Prognosis and Follow-Up

Prognosis depends on the extent of vascular obstruction and response to treatment. Regular follow-up with imaging and functional assessments is essential to monitor disease progression and adjust management.

Complications

  • Right heart failure due to prolonged pressure overload
  • Worsening respiratory function
  • Recurrent thromboembolic events
  • Reduced exercise tolerance and quality of life

Lifestyle & Prevention

  • Maintain consistent anticoagulation as prescribed
  • Engage in regular, moderate physical activity as tolerated
  • Avoid prolonged immobility; move frequently during travel or recovery
  • Manage underlying thrombotic risk factors (e.g., hydration, compression stockings)

When to Seek Professional Help

Seek immediate care for sudden worsening of shortness of breath, chest pain, or signs of heart failure (e.g., severe swelling, rapid heartbeat). Routine follow-up is recommended for ongoing monitoring of symptoms and treatment response.

Tips for Medical Coders

Document the presence of chronic thromboembolic obstruction, pulmonary hypertension confirmation, and any associated treatments (e.g., endarterectomy, angioplasty). Ensure clinical correlation with imaging or hemodynamic data to support the diagnosis.

Medical Policies and Guidelines

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