CPT code 33366 designates transcatheter aortic valve replacement performed through a transapical approach — access via the apex of the left ventricle. As a specific TAVI/TAVR technique, this code captures procedures where the valve is delivered through the cardiac apex rather than transfemoral or other access routes. Nationally, transapical TAVR remains an important option when peripheral vascular access is unsuitable, and accurate coding is critical for procedure classification, quality reporting, and claims processing.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for CPT code 33366, typical sites of service, and the service type. The publication summarizes national billing and coding considerations, common modifier usage (listed separately), and the relationships between this code and related transcatheter aortic valve procedures. It also provides benchmarking context and policy updates relevant to payers and hospital billing teams.

This summary is intended to help revenue-cycle professionals, clinicians, and policy analysts understand where 33366 fits within the spectrum of TAVR coding and payer coverage patterns, and what national coding and billing considerations apply.