Summary & Overview
CPT 33237: Explantation of Pacemaker System via Thoracotomy
CPT code 33237 represents the surgical explantation of a pacemaker system through a thoracotomy, including removal of the subcutaneous generator and extraction of two intracardiac leads. This is a high-acuity invasive cardiovascular procedure performed in the operating room or inpatient surgical setting and has implications for device management, perioperative risk, and coverage policy across major payers. Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find a compact briefing on clinical context and procedural scope, payer coverage considerations, common billing modifiers, and typical sites of service. The publication summarizes benchmarks and policy-relevant points that influence claim adjudication and payment for explantation of implanted cardiac devices. It also outlines clinical factors that commonly affect coding complexity, such as surgical approach and device components removed. Data not available in the input is noted where applicable, including detailed payer-specific rates, related ICD-10 diagnoses, and associated taxonomies.
Billing Code Overview
CPT code 33237 describes a surgical procedure to remove an implanted pacemaker system. The procedure includes a thoracotomy to access the chest wall, removal of the pacemaker generator located subcutaneously in the chest wall, and extraction of the two electrode leads that were attached to the heart surface. A pacemaker system refers to the generator (a battery-powered computerized device) and its lead wires connecting the heart muscle to the generator.
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Service type: Surgical removal of implanted pacemaker system (thoracotomy and explantation of generator and leads)
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Typical site of service: Operating room or inpatient surgical setting involving thoracic surgery
Clinical & Coding Specifications
Clinical Context
A 72-year-old male with a long-standing dual-chamber pacemaker presents with device malfunction and lead-related infection unresponsive to antibiotics. The patient has pocket erosion with purulent drainage and positive blood cultures for Staphylococcus aureus. After preoperative evaluation, the cardiothoracic surgeon schedules removal of the entire pacemaker system. In the operating room under general anesthesia, a thoracotomy approach is performed to access the cardiac surface; both transvenous epicardial leads and the subcutaneous generator are explanted. Intraoperative cultures are obtained and hemostasis is secured. The patient is monitored in the intensive care unit postoperatively for hemodynamic stability and ongoing infection management. Future reimplantation of a new pacing system is planned after infection clearance, often via a contralateral transvenous approach.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No specific modifier (default) | Use when no modifier applies and billing the primary procedure normally |
11 | Major procedural service | Use to indicate the primary service when multiple services are reported on the same date |