I26.01

Septic pulmonary embolism with acute cor pulmonale

Septic pulmonary embolism (SPE) with acute cor pulmonale is a rare but life-threatening clinical syndrome characterized by the embolization of an infected thrombus from a peripheral source into the pulmonary arterial system, resulting in acute right ventricular failure. Unlike traditional pulmonary embolism, SPE involves both mechanical obstruction and a localized infectious process within the pulmonary vasculature, leading to parenchymal inflammation or abscess formation. The 'acute cor pulmonale' component signifies that the embolic load and subsequent pulmonary vasoconstriction have caused a sudden, severe increase in pulmonary arterial pressure, leading to right ventricular dilation and dysfunction. This condition typically arises in patients with right-sided infective endocarditis, infected central venous catheters, or septic thrombophlebitis. Management requires a multi-faceted approach including hemodynamic stabilization, targeted long-term antimicrobial therapy, and identification and eradication of the infectious source.

Clinical Symptoms

  • Acute onset dyspnea
  • High-grade fever and rigors
  • Pleuritic chest pain
  • Tachycardia
  • Tachypnea
  • Cough
  • Hemoptysis
  • Hypotension and signs of shock
  • Jugular venous distention
  • Prominent P2 (pulmonary component of second heart sound)
  • Right-sided S3 or S4 gallop rhythm
  • Peripheral edema (in acute-on-chronic cases)
  • Cyanosis
  • Syncope or near-syncope

Common Causes

  • Right-sided infective endocarditis (tricuspid or pulmonary valve)
  • Infected central venous catheters (CVC)
  • Indwelling cardiac devices (pacemaker or ICD leads)
  • Lemierre syndrome (septic thrombophlebitis of the internal jugular vein)
  • Pelvic septic thrombophlebitis
  • Intravenous drug use (IVDU)
  • Arteriovenous fistula infection in hemodialysis patients
  • Soft tissue infections (e.g., cellulitis or abscesses with venous involvement)
  • Osteomyelitis

Documentation & Coding Tips

Explicitly link the septic pulmonary embolism to the underlying localized or systemic infection to capture the full severity and ensure proper sequencing.

Example: Patient diagnosed with septic pulmonary embolism with acute cor pulmonale secondary to Staphylococcus aureus tricuspid valve endocarditis. Acute right ventricular strain confirmed via bedside echocardiogram showing dilated RV and McConnell sign. Initiated IV vancomycin and heparin infusion. This represents a major complication requiring intensive care monitoring.

Billing Focus: Documentation must specify both the embolic event and the underlying infectious source to justify code I26.01 and additional codes for the infectious agent.

Document clinical or diagnostic evidence of acute cor pulmonale to validate the use of I26.01 over the non-cor pulmonale variant.

Example: Computed Tomography Angiography (CTA) demonstrates bilateral septic pulmonary emboli with reflux of contrast into the dilated inferior vena cava and right ventricular enlargement, consistent with acute cor pulmonale. BNP elevated at 1,200 pg/mL. Patient shows signs of acute right heart failure with peripheral edema and jugular venous distension.

Billing Focus: Clinical indicators like RV dilation, elevated BNP, or specific EKG changes (S1Q3T3) support the high-level specificity of this code.

Clarify the acuity and episode of care to distinguish between initial stabilization and subsequent management.

Example: Initial encounter for acute septic pulmonary embolism with cor pulmonale. Patient presented with pleuritic chest pain, rigors, and hypotension (BP 90/60). Right heart strain noted on EKG. Patient transitioned to ICU for pressor support and targeted antimicrobial therapy for known PICC-line associated sepsis.

Billing Focus: Specifying the acute nature and the need for high-intensity resources supports the medical necessity of ICU-level CPT codes and high MDM billing.

Include the pathogen when identified to allow for more granular coding of the underlying systemic condition.

Example: Septic pulmonary embolism with acute cor pulmonale due to Methicillin-resistant Staphylococcus aureus (MRSA) bacteremia from an infected hemodialysis graft. Pulmonary artery pressures estimated at 55 mmHg via echocardiography.

Billing Focus: Requires secondary codes for the organism (e.g., B95.62) and the infection site (e.g., T82.7XXA) for complete billing accuracy.

Note the presence or absence of pulmonary infarction as it frequently co-occurs with septic emboli.

Example: Imaging reveals septic pulmonary embolism with acute cor pulmonale and evidence of focal pulmonary infarction in the right lower lobe. Patient experiencing hemoptysis and localized pleurisy.

Billing Focus: While I26.01 is the primary code, documenting the infarction provides a more complete clinical picture of the lung injury.

Relevant CPT Codes

Related Diagnoses

Hierarchy