Summary & Overview
CPT 33903: Bilateral Pulmonary Artery Stent Placement
CPT code 33903 represents bilateral endovascular stent placement in the pulmonary arteries performed via abnormal vascular connections to dilate narrowed pulmonary artery walls. This interventional cardiothoracic procedure addresses stenosis in pulmonary arterial segments and has implications for hospitals, interventional programs, and payers given its complexity, resource use, and potential impact on patient outcomes. Nationally, accurate coding of 33903 supports appropriate reimbursement, utilization tracking, and clinical quality reporting for pulmonary artery stenting procedures.
Key payers included in this national perspective are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn clinical context for the procedure, typical sites of service, and which payers commonly cover such interventions. The report summarizes common modifiers associated with procedural billing and notes gaps where input data are not provided. It provides benchmarks and policy-relevant points to help coding, billing, and revenue cycle teams align documentation with payer requirements, and it outlines areas where clinical documentation should support the use of bilateral stent placement in pulmonary arteries. Data not available in the input are explicitly noted where relevant.
Billing Code Overview
CPT code 33903 describes a bilateral stent placement in the pulmonary arteries performed via abnormal connections to expand narrowed pulmonary artery walls. The procedure is a bilateral endovascular stent placement used to restore or improve blood flow through stenotic segments of the pulmonary arterial circulation caused by anomalous vascular connections.
Service type: Endovascular stent placement (pulmonary artery)
Typical site of service: Hospital inpatient or hospital outpatient interventional suite / catheterization laboratory
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult or pediatric cardiology patient with symptomatic pulmonary artery stenosis or progressive right ventricular pressure overload identified on imaging or catheterization. The patient presents with exertional dyspnea, fatigue, peripheral edema, or signs of right heart strain. Diagnostic workup commonly includes transthoracic echocardiography, CT angiography or MRI confirming focal or segmental pulmonary artery narrowing, and right heart catheterization measuring pressure gradients. After multidisciplinary review, the interventional cardiology or pediatric/congenital heart team obtains informed consent for percutaneous transcatheter pulmonary artery stent placement. Under fluoroscopic guidance in a catheterization laboratory or hybrid operating room, vascular access is obtained (typically femoral or jugular), selective pulmonary angiography performed, lesion crossed with wire, and a balloon-expandable or self-expanding stent deployed to expand the narrowed pulmonary artery. Because 33903 denotes a bilateral service, stenting is performed in both right and left pulmonary arteries during the same session. Post-deployment angiography assesses stent position and residual gradient. Hemostasis is achieved at the access site, and the patient is observed in a recovery area or admitted for short-stay monitoring for potential complications (bleeding, vessel injury, arrhythmia, stent migration, or reperfusion effects). Typical site of service is a hospital-based cardiac catheterization laboratory or hybrid operating room; ambulatory surgical centers are less common due to need for advanced imaging and potential for immediate surgical backup.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
50 | Bilateral procedure | Rare for vascular stents but may indicate bilateral pulmonary artery procedures when payer requires modifier despite code denoting bilateral service |
22 | Increased procedural services | Use when work substantially exceeds usual for complex anatomy or extended time |
52 | Reduced services | Use when procedure is partially completed or scope reduced |
53 | Discontinued procedure | Use when procedure is terminated due to patient instability or unforeseen complication |
62 | Two surgeons | Use when two surgeons of different specialties work together as primary surgeons |
76 | Repeat procedure by same physician | Data not provided in list; not allowed per strict rules |
78 | Return to OR for related procedure during postoperative period | Use when urgent surgical revision is required after stent placement |
79 | Unrelated procedure or service by the same physician during the postoperative period | Data not provided in list; not allowed per strict rules |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery | Use when an advanced practice clinician assists |
QX | Ordering physician certification — modifier for distinct and necessary services performed by a clinical laboratory; not directly applicable here but listed | Use per payer policy when applicable |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 2084P0800X | Interventional Cardiology | Physicians who perform transcatheter pulmonary artery interventions |
| 207RC0000X | Pediatric Cardiology | Pediatric specialists for congenital pulmonary artery stenosis |
| 207RP1001X | Cardiothoracic Surgery | Surgical backup for hybrid procedures and complications |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I27.20 | Pulmonary hypertension, unspecified | Pulmonary hypertension can be associated with focal pulmonary artery stenosis and may indicate stent placement to relieve obstruction |
I27.29 | Other secondary pulmonary hypertension | Secondary pulmonary hypertension from congenital or acquired pulmonary artery lesions often leads to intervention |
Q25.2 | Pulmonary valve atresia and stenosis | Congenital pulmonary valve and outflow tract abnormalities can be associated with branch pulmonary artery stenosis requiring stenting |
Q25.3 | Other congenital malformations of pulmonary artery | Direct congenital anomalies of the pulmonary arteries often require transcatheter correction |
I26.99 | Other pulmonary embolism without acute cor pulmonale | Occasionally chronic thromboembolic disease causes branch stenosis addressed with stenting (less common) |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
93458 | Catheter coronary angiography with left heart catheterization including intraprocedural injections for left ventriculography, when performed | Diagnostic left heart cath/angiography may be performed in the same session for hemodynamic assessment |
93452 | Right heart catheterization including measurement of oxygen saturation and cardiac output | Right heart catheterization commonly accompanies pulmonary artery stent placement for pressure measurements |
37246 | Transcatheter placement of endoluminal stent(s), iliac artery or aorta; initial vessel | While specific to peripheral vessels, 37246 is a related endovascular stent code representing stent placement technique analogous to pulmonary stenting |
75989 | Vascular imaging, radiological supervision and interpretation, not elsewhere classified (angiography run-offs) | Additional angiographic imaging and interpretation may be billed in complex cases |
99238 | Hospital discharge day management; 30 minutes or less | Post-procedure inpatient discharge services when patient admitted for observation |