ICD-10 Code I27.24 – Chronic thromboembolic pulmonary hypertension (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I27.24 – Chronic thromboembolic pulmonary hypertension
What it is
I27.24 identifies chronic thromboembolic pulmonary hypertension, a form of pulmonary hypertension caused by long-standing blood clots that obstruct the pulmonary arteries. It reflects persistent pressure overload in the lung circulation.
Clinical signs
Patients commonly have progressive shortness of breath, reduced exercise tolerance, fatigue, or signs of right heart strain. Clinical features vary; refer to documentation and confirm the chronic thromboembolic cause.
When to use this code
Use I27.24 when the provider documents chronic thromboembolic pulmonary hypertension or CTEPH. It is appropriate when pulmonary hypertension is linked to prior pulmonary emboli or chronic organized thromboemboli. Check documentation if the record only states pulmonary hypertension without cause.
Do not use for
Do not use this code for acute pulmonary embolism, nonspecific pulmonary hypertension, or other documented causes of pulmonary hypertension. If the condition is not clearly chronic thromboembolic, check documentation.
Coding tip
Look for explicit wording tying pulmonary hypertension to chronic thromboembolic disease before assigning I27.24.