Summary & Overview
CPT 33901: Bilateral Pulmonary Artery Stent Placement
CPT code 33901 covers bilateral endovascular stent placement in the pulmonary arteries performed via native vascular access. This interventional cardiac procedure addresses pulmonary artery stenosis by restoring vessel diameter and improving pulmonary blood flow. As a high-acuity, device-based intervention typically performed in hospital catheterization labs or interventional radiology suites, the code is relevant for cardiovascular surgery, congenital heart disease programs, and advanced pulmonary vascular care nationally.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, common billing considerations, and the types of benchmarks and policy topics that typically affect utilization and coverage decisions for high-cost device procedures. The publication highlights service setting expectations, bilateral designation implications for coding, and where readers can expect to find payer-specific coverage language and reimbursement policy updates.
The report provides practical reference material for coding teams, revenue cycle professionals, and clinical program leaders: expected service line classification, documentation touchpoints that support medical necessity, and an outline of typical payer coverage pathways. Data not available in the input will be clearly noted in specific sections; this executive summary focuses on the national clinical and billing relevance of CPT code 33901 and what readers should learn about its operational and policy context.
Billing Code Overview
CPT code 33901 describes placement of a stent in the pulmonary arteries via normal native vascular connections to expand narrowed pulmonary artery walls. The service is performed bilaterally, indicating stent placement in both pulmonary arteries during the same session.
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Service type: Endovascular pulmonary artery stent placement
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Typical site of service: Hospital-based cardiac catheterization lab or interventional radiology suite
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with a history of repaired congenital heart disease and progressive exertional dyspnea is evaluated for right ventricular outflow obstruction. Diagnostic imaging (echocardiography and CT angiography) and right heart catheterization demonstrate hemodynamically significant bilateral branch pulmonary artery stenoses with pressure gradients and reduced perfusion to both lungs. The interventional cardiology team schedules a transcatheter stent placement via femoral venous access under fluoroscopic guidance. The workflow includes pre-procedure review of imaging and hemodynamics, informed consent, vascular access and catheterization of the pulmonary arteries, balloon angioplasty as needed, deployment of stents in each narrowed pulmonary artery branch using native vascular connections, immediate angiographic confirmation of stent position and vessel patency, hemodynamic reassessment, removal of access sheaths and hemostasis, post-procedure monitoring in a recovery or step-down unit, and a discharge plan addressing antiplatelet therapy and follow-up imaging.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Standard reporting when no modifier applies |
50 | Bilateral procedure |