ICD-10 Code I26.09 – Other pulmonary embolism with acute cor pulmonale (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I26.09 – Other pulmonary embolism with acute cor pulmonale
What it is
This code identifies a pulmonary embolism from another specified cause that is complicated by acute cor pulmonale. Use it when the embolus strains the right side of the heart and the documentation supports that acute complication.
Clinical signs
Findings may include sudden shortness of breath, chest pain, syncope, or evidence of right ventricular strain. Clinical features vary; refer to documentation for the embolus type and the acute cor pulmonale diagnosis.
When to use this code
Use I26.09 when the record clearly states pulmonary embolism plus acute cor pulmonale, and the embolus is not better described by a more specific ICD-10 code. It is appropriate for inpatient or outpatient documentation that names both conditions. Check documentation if the embolus source or acuity is unclear.
Do not use for
Do not use this code for pulmonary embolism without acute cor pulmonale, or when a more specific embolism code applies. Do not assign it if the chart does not support the acute right-heart complication.
Coding tip
Confirm both the embolism and acute cor pulmonale are documented together before assigning I26.09.