CPT code 33776 identifies a complex congenital cardiac surgery — the Mustard or Senning type atrial baffle repair with closure of a ventricular septal defect performed on cardiopulmonary bypass. Nationally, this code represents high-acuity, resource-intensive inpatient cardiac procedures commonly performed at specialized centers. It is consequential for hospital surgical services, bundled payment considerations, and congenital cardiac program capacity planning.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and payment policies for this code typically reflect inpatient surgical benefit structures, case complexity, and facility-level considerations for cardiothoracic surgery.

Readers will find clinical context for the procedure, typical site-of-service expectations, and the types of insights commonly analyzed around this code, including utilization benchmarks, payer policy variations, and coding considerations relevant to cardiac surgical programs. Data not available in the input is noted where applicable, and the summary focuses on national-level implications rather than state-specific rules.