CPT code 33330 represents a high-acuity cardiac surgical service: insertion of a graft into the heart’s great vessels (aorta, pulmonary arteries/veins, or vena cava) performed without cardiopulmonary bypass. Nationally, this code captures complex vascular reconstruction procedures that are central to tertiary cardiac surgery programs and have implications for inpatient surgical throughput, resource utilization, and reimbursement for cardiothoracic services.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, typical sites of service, common billing modifiers associated with cardiovascular surgery, and the payer mix reflected across major national insurers. The publication outlines standard coding use, claims considerations relevant to non-bypass grafting of great vessels, and where to expect policy variation across commercial and public payers.

This material is intended to inform coding professionals, revenue cycle staff, and policy analysts about the clinical scope and billing context for CPT code 33330, as well as to summarize what operational and coverage topics to review when preparing or adjudicating related claims. Data not available in the input is noted where applicable.