CPT code 33610 denotes an open cardiothoracic surgical repair to enlarge a ventricular septal defect and place a valved device to regulate ventricular outflow. This invasive corrective procedure addresses congenital or persistent VSDs that cause obstruction of blood flow through the ventricular outlet and often requires specialized surgical teams, cardiopulmonary bypass, and postoperative intensive care. Nationally, procedures coded with 33610 have implications for surgical capacity, specialized resource allocation, and complex case-level reimbursement.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines payer coverage considerations, common billing and coding contexts, clinical indications and care settings, and where benchmarks typically apply for high-acuity cardiac surgical services.

Readers will learn the clinical context of the service, the typical site of service and resource needs, common modifiers used in billing workflows (listed separately), and which payer types commonly reimburse for high-complexity cardiothoracic procedures. The piece also summarizes expected documentation elements and coding considerations relevant to hospital billing teams and revenue cycle stakeholders. Data not available in the input is noted where applicable.