CPT code 33474 denotes a pulmonary valve incision (valvotomy/valvuloplasty) performed with the patient on cardiopulmonary bypass to relieve pulmonary valve stenosis. This cardiac surgical procedure is clinically significant for patients with obstructive lesions of the pulmonary valve that impair right ventricular outflow and can be performed as part of corrective congenital or acquired valve interventions. Nationally, the code matters because it captures a specialized operative intervention that influences surgical quality reporting, inpatient resource use, and cardiac surgical case mix.

Key payers discussed 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 scope of care this code represents. The publication outlines the practical billing considerations tied to inpatient cardiac surgery and highlights where 33474 fits into surgical coding workflows. It also provides benchmarks and policy context where available, and notes when input data are not provided. The goal is to help billing, coding, and clinical teams understand the code’s clinical intent and operational setting, and to point to areas where further payer-specific coverage or documentation guidance may be needed.