Summary & Overview
CPT 33611: Tunnel Graft from VSD to Aorta
CPT code 33611 identifies a cardiothoracic surgical repair in which an artificial tunnel graft is placed to redirect blood from a ventricular septal defect into the aorta. This intracardiac grafting procedure is clinically significant for correcting abnormal intracardiac shunting and is performed in hospital-based surgical settings. Nationally, the code is relevant for congenital and structural heart disease management and for tracking utilization of complex cardiac surgical interventions.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical intent of the code, typical sites of service, and the payer landscape relevant to coverage and billing. The publication also provides benchmarks and policy context where available, highlights common billing modifiers associated with complex surgical services, and summarizes clinical considerations tied to the code’s use. If specific administrative or coding crosswalks are needed, the reader will be directed to appropriate resources; missing input fields are noted as unavailable.
Billing Code Overview
CPT code 33611 describes a surgical procedure in which the provider places a tunnel graft using artificial graft material between a ventricular septal defect (an abnormal opening in the wall between the left and right ventricles) and the aorta to redirect blood flow into the aorta. This procedure is a form of intracardiac surgical repair intended to correct abnormal blood flow caused by a ventricular septal defect in the context of congenital or structural heart disease.
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Service type: Cardiothoracic surgical procedure (intracardiac graft/tunnel creation)
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Typical site of service: Inpatient operating room or cardiac surgery suite (hospital-based surgical setting)
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Clinical & Coding Specifications
Clinical Context
A pediatric or adult patient with a large, nonrestrictive ventricular septal defect (VSD) positioned such that systemic outflow is compromised may require reconstruction to redirect left ventricular outflow to the aorta. A typical scenario is a patient diagnosed with a subaortic or doubly committed VSD with associated aortic override or malalignment resulting in significant left-to-right shunt, heart failure symptoms, failure to thrive (in infants), exercise intolerance, or progressive aortic regurgitation. Preoperative workup includes transthoracic and transesophageal echocardiography to define VSD anatomy and relationships to the aortic valve, cardiac catheterization when hemodynamic assessment or coronary anatomy is required, and routine laboratory testing.
The clinical workflow: the patient is admitted to cardiothoracic surgery service, anesthetized with general endotracheal anesthesia, and undergoes median sternotomy and cardiopulmonary bypass. The surgeon places a tunnel (baffle) graft of prosthetic material from the VSD to the aortic root to redirect left ventricular blood flow into the aorta (procedure reported by 33611). Intraoperative transesophageal echocardiography confirms baffle integrity and flow redirection. The patient is weaned from bypass, observed in the cardiothoracic intensive care unit, and followed with serial echocardiography and postoperative care for anticoagulation, infection prevention, and wound management. Typical sites of service are an inpatient hospital operating room or an ambulatory cardiac surgery center approved for complex congenital procedures depending on acuity and institutional practice.
Coding Specifications
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