CPT code 33781 represents an advanced congenital cardiac surgical procedure—an arterial switch operation with coronary artery reimplantation and removal of obstructive pulmonary outflow tissue. This operation corrects discordant ventriculo-arterial connections that prevent normal systemic oxygenation and is performed in specialized centers. Nationally, this code is significant for pediatric cardiac surgery programs, hospital resource planning, and payment policy for high-acuity inpatient cardiovascular care.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context for the procedure, typical sites of service, and the service type. The publication outlines what stakeholders need to understand about billing and classification for this complex inpatient surgical service and summarizes areas where payers commonly focus reviews and prior authorization.

The content provides benchmarks and policy-relevant points, clarifies clinical indications and operative components captured by the code, and highlights implications for hospital coding, claims submission, and payer engagement. Data not included in the input—such as specific reimbursement amounts, associated ICD-10 diagnosis codes, and related CPT codes—are noted as unavailable.