CPT code 33268 denotes exclusion (for example, excision) of the left atrial appendage performed during the same surgical session as a primary procedure that requires sternotomy or thoracotomy. This code captures an adjunctive cardiac surgical step commonly performed during open-heart operations to address the left atrial appendage, a small pouch in the upper left chamber of the heart associated with thromboembolic risk. Nationally, accurate reporting of this code matters for clinical documentation, surgical quality reporting, and payment clarity for concurrent cardiac procedures.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 33268, typical sites of service, and the service type. The publication provides benchmarks and policy-oriented context where available, highlights common billing modifiers listed in the input, and outlines implications for coding and claims workflows. Where input data is missing, the text notes the absence rather than inferring details. The material is intended for coding professionals, surgical billing teams, and policy analysts seeking a national perspective on how this adjunctive cardiac procedure is represented in administrative coding.