Summary & Overview
CPT 33988: Left Heart Venting Catheter Placement During ECMO/ECLS
CPT code 33988 denotes surgical insertion of a left heart venting catheter via a thoracic incision (sternotomy or thoracotomy) performed as part of extracorporeal membrane oxygenation (ECMO) or extracorporeal life support (ECLS). The procedure is clinically important because ventricular venting can prevent chamber distension and reduce myocardial injury while ECMO/ECLS provides temporary cardiopulmonary support. Nationally, this code captures a specialized, high-acuity procedural service tied to cardiothoracic operative care and critical care pathways.
Key payers covered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for the code, common billing modifiers and service-line considerations (where available), and what typical care settings look like for this procedure. The publication also summarizes benchmark and policy-relevant issues applicable to national payers, including coding placement within the operative and critical care billing landscape, reimbursement relevance for cardiac surgery teams, and documentation elements associated with ECMO/ECLS procedures.
This summary is intended to orient hospital billing leaders, clinical coders, and policy analysts to the clinical role and payer landscape for CPT code 33988, offering a compact reference for operational and compliance planning at the national level.
Billing Code Overview
CPT code 33988 describes the surgical insertion of a left heart venting catheter through a thoracic incision (for example, a sternotomy or thoracotomy). The service is performed as part of extracorporeal membrane oxygenation (ECMO) or extracorporeal life support (ECLS) to prevent distension of the heart chambers while the ECMO/ECLS circuit assumes circulatory and/or respiratory function.
Service type: Surgical procedure, cardiac venting catheter placement as part of ECMO/ECLS
Typical site of service: Operating room or cardiac surgery suite during thoracic surgery (sternotomy or thoracotomy)
Clinical & Coding Specifications
Clinical Context
A typical patient is a critically ill adult with severe cardiopulmonary failure placed on venoarterial or venovenous extracorporeal membrane oxygenation (ECMO/ECLS) in an operating room or cardiothoracic intensive care unit. After a median sternotomy or thoracotomy for implantation of ECMO cannulas or during open chest cardiac surgery, the cardiothoracic surgeon inserts a left heart venting catheter through a thoracic incision to decompress the left ventricle and prevent chamber distension. The workflow begins with preoperative stabilization and imaging, induction of anesthesia in the operating room, and surgical exposure via sternotomy or thoracotomy. The surgeon selects an appropriate vent site (left atrium, left ventricle apex, or pulmonary vein), places purse-string sutures, inserts and secures the vent catheter, connects it to the ECMO circuit or external drainage, confirms position and function by direct inspection and hemodynamic monitoring, and documents the procedure, indications, and catheter details in the operative note. Post-procedure care includes hemodynamic monitoring in the intensive care unit, anticoagulation management per protocol, chest tube management if present, and serial assessments of ventricular size and function by echocardiography.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Use when no specific modifier applies and billing requires a neutral code indicator |