CPT code 33264 captures the surgical removal and replacement of an implantable defibrillator pulse generator in patients with leads to at least three cardiac chambers. This procedure is clinically important for maintaining or restoring device function when a pulse generator fails, reaches end of service life, or is implicated in device-related infection. Nationally, device replacement procedures carry implications for acute care resource use, perioperative management, and device registry reporting.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines coverage and billing benchmarks, common modifier usage, and clinical context relevant to electrophysiology and cardiac surgery service lines. Readers will find a concise explanation of the service description and typical sites of care, a summary of payer coverage considerations, and pointers to related service coding where available.

This overview is intended for revenue cycle professionals, coding and compliance teams, and clinicians involved in device management. It focuses on the code definition, clinical scenario, and where the service is commonly performed, providing a foundation for coding, billing, and administrative workflows. Data not available in the input is noted where applicable.