Summary & Overview
CPT 37237: Add-On Endovascular Arterial Stent Placement
CPT code 37237 describes an add-on endovascular stent placement performed by inserting a stent in an artery via catheter after stent insertion in a separate artery. This code captures additional procedural work when multiple arterial stents are placed during the same encounter and is important for accurately reflecting complexity and resource use in vascular interventions. Nationally, accurate use of the code affects facility and physician billing, claims adjudication, and quality measurement for vascular and interventional specialties.
Key payers in typical analyses include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers can expect a concise review of how the code is used clinically, typical sites of service, and common payer coverage considerations. The publication outlines benchmarks for utilization and reimbursement patterns when available, recent policy updates that affect coding and bundling, and clinical context distinguishing primary versus add-on stent procedures.
The report also identifies operational considerations for billing teams and coders, common modifier usage patterns (listed separately), and alignment with interventional vascular practice workflows. Data not provided in the input (such as specific utilization metrics, associated ICD-10 diagnoses, and related codes) are noted as unavailable and are not fabricated here.
Billing Code Overview
CPT code 37237 is an add-on endovascular stent placement procedure performed when a provider inserts a stent in an artery using a catheter following stent insertion in a separate artery. The procedure may be performed via percutaneous or open arterial access.
Service Type: Endovascular stent placement (add-on)
Typical Site of Service: Hospital inpatient or outpatient vascular lab/interventional suite, or ambulatory surgery center, depending on clinical context and facility capabilities.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with symptomatic multivessel peripheral or visceral arterial disease undergoing endovascular treatment. For example, a 68-year-old man with lifestyle-limiting claudication and critical limb ischemia is brought to the angiography suite. Diagnostic angiography demonstrates a significant stenosis in the femoropopliteal segment and a separate significant stenosis in the ipsilateral popliteal artery. The interventional vascular surgeon or interventional radiologist obtains vascular access (percutaneous common femoral artery access), performs angioplasty and deploys a stent in the first target artery. Upon completion, the team advances a catheter and deploys an additional stent in a second, separate arterial segment during the same session. The encounter includes pre-procedure consent, intraprocedural imaging with fluoroscopy and contrast, device deployment, hemostasis of access site, and immediate post-procedure assessment.
Typical site of service: hospital-based interventional radiology or vascular surgery suite, ambulatory surgical center, or inpatient operating room for open access when required.
Service type: endovascular stent deployment — add-on stent placement to a separate artery performed during the same session following initial stent insertion.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when only the physician interpretation/professional work is billed separate from technical services. |