CPT code 33875 denotes replacement of the descending thoracic aorta with a graft, a high-acuity open thoracic aortic surgery that may be performed with cardiopulmonary bypass. This procedure is nationally significant because it addresses life-threatening aortic disease — including aneurysm and dissection — and involves substantial resource use, operative risk, and post-operative critical care.

Key payers evaluated include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical indications and the typical hospital setting for this operation, plus the benchmarks and payment considerations commonly associated with major thoracic aortic procedures. The publication highlights expected utilization patterns, common billing and coding contexts, and areas where policy updates or payer-specific coverage rules often influence authorization and reimbursement workflows.

This summary equips hospital administrators, coding professionals, and clinical leaders with the context needed to align clinical documentation and billing for complex aortic surgery, understand payer engagement priorities, and monitor policy or guideline changes that affect access and payment for high-cost surgical interventions.