CPT code 36450 represents an exchange transfusion performed on newborns, typically via an umbilical blood vessel, to remove bilirubin-laden blood and replace it with donor blood or plasma. The procedure is a high-acuity neonatal intervention used to treat severe hyperbilirubinemia and prevent bilirubin-induced neurologic dysfunction. Nationally, exchange transfusion is a critical but infrequently used life-saving therapy that has implications for neonatal clinical protocols, blood-bank coordination, and inpatient reimbursement.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, comparisons of coverage patterns across major national payers, and benchmarks related to site-of-service and utilization where available. The publication also outlines coding considerations specific to CPT code 36450, common modifiers applicable to transfusion and procedural billing, and typical billing practice for inpatient neonatal care.

This resource is intended for hospital administrators, neonatal clinicians, revenue-cycle staff, and policy analysts who need a clear, national-level summary of the clinical purpose of CPT code 36450, payer coverage landscape, and the operational factors that influence use and billing of exchange transfusion in newborns.