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.