Summary & Overview
CPT 33477: Percutaneous Pulmonary Valve Implantation
CPT code 33477 denotes percutaneous (transcatheter) pulmonary valve implantation, a minimally invasive alternative to open surgical pulmonary valve replacement frequently used in patients with prior congenital heart repairs whose native or repaired valves have become dysfunctional. Nationally, this procedure matters because it expands treatment options for complex congenital and structural heart disease, reduces hospital length of stay for select patients, and influences capital and device utilization across cardiology programs.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a concise overview of clinical context and payer considerations, plus benchmarks where available. Readers will learn: the clinical indications and typical care setting for CPT code 33477; common billing and coding relationships and how this service fits into service-line reporting for interventional cardiology; and policy-relevant topics such as coverage drivers for transcatheter pulmonary valve replacement and implications for hospital and outpatient cardiac service lines. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 33477 describes a percutaneous implantation of a pulmonary valve. The procedure is performed through a skin incision and catheter-based access to the heart as a less invasive alternative to open surgical pulmonary valve replacement. It is typically used for patients who previously underwent pulmonary valve repair for congenital heart disease and now have valve dysfunction requiring replacement. A stent may be placed at the valve site to maintain patency prior to or during valve implantation.
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Service type: Percutaneous transcatheter pulmonary valve implantation (interventional cardiology/cardiothoracic interventional procedure)
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Typical site of service: Hospital or outpatient cardiac catheterization laboratory or hybrid operating room for transcatheter valve replacement
Clinical & Coding Specifications
Clinical Context
A 32-year-old patient with a history of repaired congenital tetralogy of Fallot presents with progressive exertional dyspnea and echocardiographic evidence of severe pulmonary regurgitation and right ventricular dilation. The interventional cardiology team evaluates the patient and determines transcatheter pulmonary valve implantation is appropriate to replace the dysfunctional surgical or native pulmonary valve. The patient is scheduled for a percutaneous right heart catheterization in the cardiac catheterization laboratory under general anesthesia or monitored anesthesia care. Vascular access is obtained via a femoral venous approach; balloon sizing and/or pre-stent placement is performed as indicated to prepare the landing zone. A transcatheter valved stent (pulmonary valve) is advanced across the right ventricular outflow tract and deployed under fluoroscopic and hemodynamic guidance. Post-deployment angiography and hemodynamic assessment confirm valve position, competence, and gradients. The patient is observed in the post-anesthesia care unit and admitted to a monitored bed for overnight observation with telemetry, with plans for routine post-procedure anticoagulation or antiplatelet therapy as indicated by the implant and institutional protocols.
Coding Specifications
- Modifier table
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal or default billing for the principal procedure |