Summary & Overview
CPT 33417: Aortoplasty for Supravalvular Aortic Stenosis
CPT code 33417 represents surgical aortoplasty performed to correct supravalvular aortic stenosis, a congenital obstruction of the ascending aorta above the valve. This procedure is clinically significant because it addresses a structural lesion that can cause left ventricular outflow obstruction, heart failure, and long-term morbidity if left untreated. Surgical repair is often performed in specialized centers and can involve complex reconstruction techniques.
Key national payers in the discussion include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. The analysis addresses coverage and billing context across these major payers to inform providers and billing staff about how this service is typically categorized and reimbursed at a national level.
Readers will find an overview of the clinical context for 33417, typical site-of-service considerations, and what to expect in billing practice. The publication also outlines common modifiers and related billing elements (Data not available in the input for some fields) and highlights benchmarks and policy considerations relevant to hospital-based cardiac surgical procedures. The content is intended to support coding accuracy, administrative planning, and payer communication for teams managing congenital aortic stenosis repairs.
Billing Code Overview
CPT code 33417 describes an aortoplasty to treat supravalvular aortic stenosis, a congenital narrowing of the aorta above the aortic valve. The procedure involves surgical repair or reconstruction of the narrowed supravalvular segment to relieve obstruction and improve blood flow from the left ventricle.
Service type: Cardiac surgical repair (open or reconstructive aortic surgery)
Typical site of service: Inpatient hospital operating room, often performed by pediatric or adult congenital cardiothoracic surgery teams in tertiary care or specialized cardiac centers.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adolescent or young adult with congenital supravalvular aortic stenosis presenting with exertional dyspnea, chest pain, or decreased exercise tolerance. Diagnostic workup includes echocardiography demonstrating supravalvular narrowing of the ascending aorta with pressure gradient and possible left ventricular hypertrophy; cardiac catheterization may be performed for hemodynamic assessment. The patient is scheduled for surgical aortoplasty (CPT 33417) in an operating room at an acute care hospital with cardiothoracic surgery and cardiopulmonary bypass capabilities. Preoperative steps include cardiology and anesthesia evaluation, informed consent, blood type and crossmatch, and optimization of comorbid conditions. Intraoperative workflow involves median sternotomy, institution of cardiopulmonary bypass, inspection of the aortic root and ascending aorta, excision or patch enlargement of the supravalvular narrowed segment (aortoplasty), valve inspection and repair if indicated, hemostasis, and transfer to the cardiovascular intensive care unit for postoperative monitoring. Postoperative care focuses on hemodynamic monitoring, pain control, respiratory support as needed, and echocardiographic assessment prior to discharge and scheduled follow-up with cardiology and cardiothoracic surgery.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |