J94.2

Hemothorax

Hemothorax is a clinical condition characterized by the accumulation of blood within the pleural cavity, the space between the visceral and parietal pleura surrounding the lungs. This accumulation can lead to significant respiratory impairment by compressing the lung and causing atelectasis. While most frequently associated with blunt or penetrating thoracic trauma (which may be coded elsewhere in the S-series if trauma is specified), the J94.2 code is utilized for non-traumatic hemothorax or cases where the underlying etiology is not immediately specified as acute trauma. Non-traumatic etiologies include pleural malignancies, thoracic aortic aneurysms, pulmonary infarctions, or complications related to anticoagulation therapy. Hemothorax is classified as massive if it involves a rapid accumulation of more than 1,500 mL of blood or more than one-third of the patient's blood volume, which constitutes a life-threatening emergency due to the dual risk of hypovolemic shock and severe respiratory failure.

Clinical Symptoms

  • Acute pleuritic chest pain
  • Dyspnea (shortness of breath)
  • Tachypnea (rapid breathing)
  • Tachycardia (rapid heart rate)
  • Hypotension or signs of shock
  • Decreased or absent breath sounds on the affected side
  • Dullness to percussion over the affected hemithorax
  • Asymmetrical chest wall expansion
  • Cyanosis (in severe cases)
  • Anxiety and restlessness
  • Tracheal deviation (in massive tension hemothorax)

Common Causes

  • Thoracic trauma (blunt or penetrating)
  • Rupture of an intrathoracic aortic aneurysm
  • Primary or metastatic pleural malignancy
  • Complications of anticoagulant or thrombolytic therapy
  • Pulmonary infarction
  • Iatrogenic injury (e.g., central venous catheterization, thoracentesis, or lung biopsy)
  • Thoracic endometriosis (Catamenial hemothorax)
  • Ehlers-Danlos syndrome (vascular type)
  • Rupture of intercostal or internal mammary arteries
  • Spontaneous hemopneumothorax

Documentation & Coding Tips

Distinguish between traumatic and nontraumatic etiology to ensure correct code assignment.

Example: A 72-year-old male with a history of hypertension and long-term Warfarin use (Z79.01) for atrial fibrillation presents with sudden onset dyspnea. Chest imaging reveals a large right-sided pleural collection. Thoracentesis confirms blood, resulting in a diagnosis of spontaneous nontraumatic hemothorax (J94.2) due to supratherapeutic anticoagulation (D68.32). This note captures the laterality and the systemic cause (coagulopathy), which increases the Risk Adjustment factor due to the high-complexity management of hemorrhage in a medicated patient.

Billing Focus: Identify the cause as nontraumatic to justify J94.2 over S27.1 (Traumatic hemothorax).

Document the presence of associated pneumothorax when hemopneumothorax is diagnosed.

Example: The patient was found to have a spontaneous hemopneumothorax (J94.2, J93.83) on the left side, unrelated to any recent injury or invasive procedure. Documentation includes the total volume of blood evacuated (450mL) and the degree of lung collapse (30 percent). Billing requires both codes to fully describe the pleural space pathology, while risk adjustment models recognize the combined complexity of managing both air and blood in the thoracic cavity.

Billing Focus: Dual coding for both blood (J94.2) and air (J93.x) components in the pleural space.

Specify any underlying malignancy if the hemothorax is a complication of a neoplasm.

Example: Patient with known metastatic stage IV adenocarcinoma of the right lower lobe (C34.31) developed an acute nontraumatic hemothorax (J94.2). The hemothorax is identified as a secondary manifestation of the malignant invasion into the pleural vessels. Documentation specifies the primary site and the acute complication to support moderate MDM level 99214 and specialized thoracic surgical consultation for pleurodesis.

Billing Focus: Linkage between the hemothorax and the specific site of malignancy.

Detail the clinical acuity and associated respiratory failure if present.

Example: Acute nontraumatic hemothorax (J94.2) led to acute hypoxic respiratory failure (J96.01) necessitating urgent intubation and chest tube placement (32551). The documentation clearly states the acuity and the functional impairment of the respiratory system. This supports high-level emergency department billing (99285) and significantly raises the patient's risk profile in the HCC framework.

Billing Focus: Clear documentation of respiratory failure as a secondary diagnosis.

Differentiate between post-procedural hemorrhage and spontaneous occurrence.

Example: Hemothorax (J94.2) occurred spontaneously in a patient with systemic lupus erythematosus (M32.10) without any recent surgical history. If this had followed a lung biopsy, a post-procedural complication code (J95.830) would be required. By documenting the lack of recent intervention, the spontaneous nature is confirmed, supporting the medical management billing under 99214 with a moderate level of MDM (30-39 minutes).

Billing Focus: Verification of the absence of recent procedures to support the spontaneous diagnosis code.

Relevant CPT Codes

Related Diagnoses

Hierarchy