CPT code 33615 represents a complex congenital cardiac surgical repair that combines closure of an atrial septal defect with a patch and surgical anastomosis of the pulmonary artery to correct tricuspid atresia. This procedure is clinically significant because it addresses structural defects present at birth that obstruct normal right-heart inflow and pulmonary circulation; timely surgical correction can be essential for physiological stability and long-term outcomes. National stakeholders — including commercial payers and Medicare — cover and review billing and clinical documentation for such high-acuity inpatient procedures due to the resource intensity and specialty care required.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical intent of the code, expected site-of-service and service type, common billing modifiers associated with complex surgeries (listed separately), and the types of benchmarks and policy items typically relevant for high-complexity congenital cardiac surgery. The publication summarizes payer coverage patterns, typical documentation elements that support medical necessity, and considerations for claims processing and coding accuracy. It also highlights where national policy updates and payer guidelines commonly intersect with clinical practice for congenital cardiac procedures.