CPT 33900 Pulmonary Artery Stent Reimbursement

CPT code 33900 represents a unilateral pulmonary artery stent placement performed via native vascular access, an endovascular procedure used to relieve pulmonary arterial stenosis. This intervention is clinically significant for patients with congenital or acquired pulmonary artery narrowing because it can improve pulmonary blood flow and reduce right-sided cardiac pressure load. Nationally, such procedures are performed in specialized centers and billed across both commercial insurers and public programs.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The summary addresses coverage and billing considerations as they apply across major national payers and highlights areas of consistency and variation in coding and site-of-service reporting.

Readers will gain a concise overview of the clinical context for 33900, typical settings where the service is provided, and what to expect in payer coverage patterns. The publication outlines common billing practices and benchmarking points, clarifies when the service is billed as unilateral, and summarizes policy updates and coding guidance where available. Data not available in the input is noted explicitly for elements that could not be provided.

Billing Code Overview

CPT code 33900 describes a pulmonary artery stent placement performed via normal native vascular access to expand a narrowed pulmonary artery. The procedure is billed as a unilateral endovascular intervention to relieve stenosis within a pulmonary arterial branch.

Service Type: Endovascular stent placement (pulmonary artery)

Typical Site of Service: Hospital-based interventional radiology or cardiac catheterization laboratory, inpatient or outpatient setting depending on clinical context

Clinical Context

A 58-year-old patient with a history of pulmonary hypertension and exertional dyspnea undergoes diagnostic imaging (CT pulmonary angiography and right heart catheterization) demonstrating a focal high-grade stenosis of a segmental pulmonary artery. The interventional cardiology or interventional radiology team schedules a transcatheter pulmonary artery stent placement via native vascular access. The patient is brought to an angiography suite or hybrid OR, receives conscious sedation or general anesthesia based on anesthesiology assessment, and vascular access is obtained (typically via femoral or jugular vein). Under fluoroscopic and angiographic guidance, balloon angioplasty may be performed followed by deployment of a stent to expand the narrowed pulmonary arterial segment. Hemostasis is achieved at the access site and the patient is monitored in a recovery area or inpatient unit for potential complications such as bleeding, vascular injury, arrhythmia, or reperfusion pulmonary edema. Documentation includes pre-procedure indication, informed consent, imaging findings, device details (stent type, size, lot), laterality (unilateral), complications, and post-procedure condition.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier — standard reporting	Use when no additional modifier applies to the service.
`22`

Taxonomy Code	Specialty	Notes
`334U00000X`	Interventional Cardiology	Primary specialty performing transcatheter pulmonary artery interventions in many centers.
`334500000X`	Pediatric Cardiology (Interventional)	Performs pulmonary artery stenting in congenital or pediatric pulmonary artery stenosis.
`208000000X`	Interventional Radiology	Performs endovascular pulmonary artery stent placement using image-guided techniques.
`207RP0000X`	Cardiothoracic Surgery	May be involved for complex hybrid cases or surgical access.
`363L00000X`	Vascular Surgery	In centers where vascular surgeons perform endovascular pulmonary interventions.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I27.0`	Primary pulmonary hypertension	Pulmonary artery stenosis or elevated pulmonary vascular resistance may be associated; stenting treats focal obstruction contributing to symptoms.
`I27.20`	Pulmonary hypertension, unspecified	Common underlying diagnosis prompting evaluation and possible pulmonary artery intervention.
`I26.9`	Pulmonary embolism without acute cor pulmonale	Residual thromboembolic disease can cause focal arterial narrowing addressed by stenting in select chronic thromboembolic pulmonary hypertension cases.
`Q25.1`	Pulmonary valve stenosis	Congenital right-sided obstructive lesions may coexist with branch pulmonary artery stenosis requiring stenting.
`Q25.4`	Congenital pulmonary artery stenosis	Direct indication for pulmonary artery stent placement in congenital cases.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93462`	Catheter placement in coronary/ pulmonary arteries for diagnostic angiography including hemodynamic measurements	Often performed prior to stent placement to define anatomy and measure pressures.
`92980`	Transcatheter placement of intravascular stent(s), coronary or non-coronary, initial vessel	May be used in some reporting systems for non-coronary intravascular stent placement when anatomy or payer guidance differs; relates as an alternative coding pathway.
`35476`	Transcatheter placement of intravascular stent(s), pulmonary artery (unlisted specific codes)	Used in some specialty coding sets for pulmonary vascular stent procedures; performed during the same encounter.
`76937`	Ultrasound guidance for vascular access requiring image documentation	May be reported for real-time ultrasound-guided venous access used to obtain access for the pulmonary stent procedure.
`36415`	Collection of venous blood by venipuncture	Performed pre-procedure for laboratory evaluation; supports medical necessity and peri-procedural management.

OpenPayer

Summary & Overview

CPT 33900: Pulmonary Artery Stent Placement, Unilateral