CPT code 33256 represents an open surgical atrial ablation with reconstruction of the left and right atria performed for treatment of atrial fibrillation, using cardiopulmonary bypass. This complex, invasive cardiac procedure is significant nationally because it is reserved for patients with extensive atrial disease or when less invasive catheter-based strategies are unsuitable. It involves cardiothoracic surgical teams and inpatient perioperative care, with implications for hospital resource use and surgical quality measures.

Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, an overview of typical sites of service and care setting, and guidance on the types of benchmarks and policy topics that commonly apply to high-acuity cardiac surgical services. The publication outlines payment and utilization considerations relevant to hospitals and cardiothoracic practices, highlights common modifiers used in surgical coding (listed separately), and notes where input data was unavailable.

The content is intended to inform clinicians, billing professionals, and policy analysts about the clinical intent of 33256, expected care setting, and the payer landscape covered in the analysis. Data not available in the input includes associated taxonomies, specific ICD-10 diagnoses, related codes, and detailed service-line metrics.