Summary & Overview
CPT 33259: Extensive Atrial Ablation and Reconstruction
CPT code 33259 denotes an extensive surgical ablation and reconstruction of the left and right atria performed at the same time as another cardiac procedure, with the patient on cardiopulmonary bypass. This code captures high-complexity, inpatient cardiothoracic surgery aimed at treating atrial fibrillation by destroying arrhythmogenic atrial tissue and reconstructing atrial chambers. Nationally, the code is relevant for hospitals, cardiothoracic surgeons, and payers managing high-acuity cardiac surgical case mixes and episode-of-care payments.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines clinical context for the procedure, expected service line and site of service, and payer coverage considerations. Readers will find a concise explanation of the procedure captured by CPT code 33259, commonly used claim modifiers and how they relate to complex cardiac surgery (listed elsewhere), and a summary of typical reimbursement and utilization benchmarks where available. The content is intended to help coding staff, billing managers, and policy analysts understand the clinical intent and billing context for this high-complexity cardiac surgical code at a national level.
Billing Code Overview
CPT code 33259 describes a complex cardiac surgical procedure performed concurrently with another cardiac operation in which the surgeon destroys extensive atrial tissue responsible for abnormal electrical activity and then performs an extensive reconstruction of the left and right atria. The intent is to treat atrial fibrillation by interrupting aberrant conduction pathways and restoring more normal atrial anatomy and function. The procedure is performed with the patient on cardiopulmonary bypass.
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Service type: Open cardiac surgical ablation with extensive atrial reconstruction performed concomitantly with another cardiac procedure
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Typical site of service: Hospital operating room, performed as part of inpatient cardiothoracic surgery
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with long-standing symptomatic atrial fibrillation presenting for concomitant surgical ablation at the time of planned cardiac surgery (for example, mitral valve repair or coronary artery bypass grafting). The patient has failed or is intolerant of multiple antiarrhythmic medications and has persistent symptomatic palpitations, reduced exercise tolerance, and episodes of heart failure exacerbation related to atrial fibrillation. Preoperative evaluation includes transthoracic and transesophageal echocardiography to assess atrial size and valvular pathology, ECG documentation of atrial fibrillation, and routine cardiac catheterization as indicated. The procedure is performed in an operating room with cardiopulmonary bypass: the surgeon performs extensive atrial tissue destruction (surgical ablation) and extensive left and right atrial reconstruction (cut-and-sew or modified Cox-Maze lesion set) at the same time as the primary cardiac procedure. Intraoperative transesophageal echocardiography confirms cardiac function and repair integrity. Postoperative management occurs in a cardiac intensive care unit with telemetry monitoring, anticoagulation management, and rhythm surveillance for recurrent atrial arrhythmias. Typical billing reflects a primary cardiac procedure with concurrent additive documentation for the atrial ablation/reconstruction and use of cardiopulmonary bypass.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
62 | Two surgeons | Use when two surgeons of different specialties perform distinct portions of the operative procedure (eg, a cardiac surgeon and a congenital specialist). |