CPT code 33665 identifies surgical repair of an atrioventricular (AV) canal defect, a congenital cardiac lesion requiring closure of septal defects and restoration of atrioventricular valve function. This code captures complex open-heart procedures that can include valve repair or valve replacement when structural damage is severe. Nationally, coding and reimbursement for congenital heart repairs like this matter because they involve high-resource inpatient care, specialized surgical teams, and potential long-term follow-up.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a clinical and billing-focused overview of the procedure and its typical site of service, plus guidance on what to expect in payer coverage patterns and documentation emphasis for complex congenital cardiac surgery. The publication highlights benchmarks related to service intensity and inpatient utilization, summarizes relevant policy considerations affecting authorization and coverage, and provides clinical context to support accurate claim submission for centers performing congenital cardiac surgery.

Data not available in the input for associated taxonomies, specific payer policy edits, and ICD-10 diagnoses. The content is intended as a national overview of the code's clinical meaning, service setting, and payer relevance.