Summary & Overview
CPT 33621: Thoracic Endovascular Stent Placement
CPT code 33621 covers thoracic endovascular stent placement: insertion of a catheter through the chest into a blood vessel and deployment and expansion of a stent to treat a narrowed segment and restore blood flow. This procedure is a key intervention for thoracic vascular stenoses and carries important implications for hospital workflow, resource utilization, and national reimbursement patterns. It is commonly performed in hospital operating rooms and interventional radiology or cardiac catheterization laboratories.
Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on the clinical context of the procedure, common billing modifiers, typical sites of service, and which payer types are relevant for coverage discussions. The publication offers benchmarks and comparative insights into reimbursement and utilization trends, highlights policy updates that affect national payment practices, and provides operational considerations for coding and claim submission. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 33621 describes a trans-thoracic endovascular procedure in which a provider inserts a catheter through the chest into a blood vessel and deploys a stent to treat a stenosed (narrowed) segment. The stent is expanded to restore and maintain vessel patency and improve blood flow.
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Service type: Endovascular stent placement via thoracic access
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Typical site of service: Hospital operating room or interventional radiology/cardiac catheterization laboratory
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with progressive exertional dyspnea and signs of right-sided heart failure is evaluated for symptomatic pulmonary artery stenosis identified on prior CT angiography. After diagnostic right heart catheterization demonstrating a flow-limiting lesion in the proximal pulmonary artery, the interventional cardiothoracic team schedules a trans-thoracic catheter-based pulmonary artery stent placement. The patient arrives to the hospital procedure suite under monitored anesthesia care or general anesthesia. Vascular access is obtained via a central venous approach through the chest (commonly via the internal jugular or subclavian vein), and a guide catheter is advanced into the pulmonary artery. Contrast angiography delineates the stenosis, a stent is sized and delivered across the narrowed segment, and the stent is deployed and expanded to restore vessel lumen and pulmonary blood flow. Hemostasis is achieved at the access site, the patient is monitored in the recovery area or ICU depending on hemodynamics, and post-procedure imaging and anticoagulation/antiplatelet plans are implemented per institutional protocol.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician's professional services separate from technical components if applicable to imaging guidance billing. |