32100

Thoracotomy; with exploration

Current Procedural Terminology (CPT) code 32100 represents a major surgical procedure involving an open thoracotomy with direct exploration of the pleural cavity and thoracic organs. A thoracotomy is a highly invasive surgical incision into the chest wall, providing direct, unhindered access to the pleural space, lungs, esophagus, trachea, and the heart. This specific procedural code is utilized exclusively when the primary intent and the final extent of the surgical operation is diagnostic exploration, rather than a definitive therapeutic intervention or an anatomical resection such as a lobectomy or pneumonectomy. During this operation, the patient is almost universally placed in a lateral decubitus position under general anesthesia, usually with selective single-lung ventilation facilitated by a double-lumen endotracheal tube to deflate the operative lung. The cardiothoracic surgeon makes an extensive incision, most commonly a posterolateral, anterolateral, or axillary thoracotomy, depending on the suspected pathology and the thoracic region requiring maximum visualization. The superficial soft tissues and deep musculature, including the latissimus dorsi and serratus anterior muscles, are carefully divided or spared depending on the exact surgical technique. The targeted intercostal muscles are then separated, and a robust mechanical rib spreader is inserted to firmly retract the ribs, thereby exposing the thoracic cavity. Once completely inside the pleural space, the surgeon conducts a systematic, meticulous, and comprehensive manual and visual examination of the visceral and parietal pleura, the pulmonary parenchyma, all identifiable mediastinal structures, and the diaphragm. This level of extensive open exploration is frequently indicated for patients presenting with severe, undiagnosed blunt or penetrating chest trauma, uncontrolled or occult intrathoracic hemorrhage, suspected complex mediastinal or pulmonary masses, or persistent, unexplained pleural effusions where minimally invasive techniques like Video-Assisted Thoracoscopic Surgery (VATS) are heavily contraindicated, technically impossible, or have already proven insufficient. If a discrete source of minor bleeding is identified, surgical hemostasis is immediately achieved. However, it is a critical coding rule that if the diagnostic exploration mandates a more complex, definitive surgical repair or major resection during the very same session, the appropriate code for that specific therapeutic procedure must be reported entirely in place of 32100. Following the complete inspection and execution of all necessary diagnostic steps, large-bore chest tubes are typically placed to adequately drain residual air and serosanguinous fluid, and the chest wall is meticulously reconstructed and closed in multiple anatomical layers.

Clinical Indications

  • Uncontrolled or occult intrathoracic hemorrhage
  • Severe blunt or penetrating chest trauma requiring direct visual assessment
  • Undiagnosed and persistent pleural effusion or pleural thickening
  • Direct evaluation of complex pulmonary or mediastinal masses when VATS is not feasible
  • Suspected intrathoracic foreign body requiring manual retrieval
  • Assessment of lung viability following severe pulmonary infection or trauma

Procedure Steps

  1. The patient is placed under general anesthesia with double-lumen endotracheal intubation for single-lung ventilation.
  2. The patient is securely positioned, typically in the lateral decubitus position.
  3. The surgeon creates a posterolateral, anterolateral, or axillary incision over the designated intercostal space.
  4. Overlying soft tissue and musculature, such as the latissimus dorsi and serratus anterior, are carefully divided or retracted.
  5. The targeted intercostal space is entered by dividing the intercostal muscles.
  6. A rib spreader is deployed to separate the ribs and open the chest cavity widely.
  7. Meticulous visual and manual exploration of the pleural cavity, lung parenchyma, diaphragm, and mediastinal structures is performed.
  8. Surgical hemostasis is achieved if minor or incidental bleeding is encountered during the exploration.
  9. One or more large-bore thoracostomy tubes (chest tubes) are placed through separate stab incisions to evacuate post-operative air and fluid.
  10. The ribs are closely approximated using heavy pericostal sutures.
  11. The intercostal muscles, deep musculature, subcutaneous tissue, and skin are meticulously closed in successive anatomical layers.

Coding Guidelines

  • CPT code 32100 describes a standalone open exploratory thoracotomy.
  • Do not report 32100 in conjunction with another open therapeutic thoracic procedure (such as lobectomy, wedge resection, or pneumonectomy) performed on the same side during the same operative session, as exploration is inherently included in the major procedure.
  • If a diagnostic VATS exploration (CPT 32601) requires conversion to an open exploratory thoracotomy, report only the successful open procedure (32100).
  • Modifier 22 may be appended if the procedural work required to perform the exploration is substantially greater than typically required, supported by thorough documentation.
  • Modifiers 58, 78, or 79 may apply if this procedure is performed during the postoperative global period of a previously performed, related or unrelated procedure.
  • Do not bill this code for routine placement of a chest tube; use appropriate tube thoracostomy codes instead.

Associated ICD-10 Codes