ICD-10 Code J94.2 – Hemothorax (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J94.2 – Hemothorax
What it is
Hemothorax means blood has collected in the pleural space, the area between the lung and chest wall. It is usually caused by trauma, procedures, or other chest injury.
Clinical signs
Common findings include chest pain, shortness of breath, and decreased breath sounds on the affected side. Imaging may show pleural fluid; clinical features vary, so refer to documentation.
When to use this code
Use J94.2 when the record clearly documents hemothorax as the diagnosis. It fits traumatic or nontraumatic blood in the pleural space when the provider identifies the condition. If the chart only says pleural effusion, do not assume hemothorax.
Do not use for
Do not use this code for simple pleural effusion, pneumothorax, or unspecified chest fluid without blood. Check documentation if the note does not confirm hemothorax.
Coding tip
Code hemothorax only when the provider states blood in the pleural space, and verify whether an associated injury or procedure should also be reported.