CPT code 33675 represents surgical closure of several ventricular septal defects using sutures or patch grafts to stop the mixing of oxygenated and deoxygenated blood in the ventricles. This cardiac surgical code is clinically significant because ventricular septal defects can impair oxygen delivery and require timely repair, often in an inpatient surgical setting. Nationally, such procedures are a core element of congenital cardiac surgery services and affect hospital surgical volumes, resource allocation, and perioperative planning.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and billing overview of the procedure, common payer coverage considerations, typical sites of service, and the benchmarks and policy context that commonly influence payment and utilization for complex cardiac surgery. The publication outlines claim coding context, common modifiers used with this code (listed separately), and areas where policy updates or payer edits most frequently arise.

This summary is intended to give clinicians, coders, and policy analysts a clear national-level snapshot of CPT code 33675, emphasizing clinical purpose, expected site of service, and the payer landscape underlying coverage and reimbursement discussions.