Summary & Overview
CPT 37256: Angioplasty for Complex Iliac Artery Occlusion
CPT code 37256 represents angioplasty of a complex iliac artery lesion (including complete occlusions) and covers all access, catheterization, lesion crossing, and imaging guidance required to complete the procedure. This code applies to interventions in the common, internal, or external iliac arteries and may be performed percutaneously or via an open approach. The code is nationally relevant because peripheral arterial disease and iliac occlusive disease contribute significantly to morbidity and health care utilization; accurate coding informs resource allocation, quality measurement, and procedural monitoring.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical and coding summary, typical sites of service, and the types of benchmarks and policy considerations generally associated with complex peripheral vascular interventions. The publication outlines what to expect for coverage and payment frameworks at a national level, highlights clinical context for use of the code, and identifies where additional data would normally be consulted (benchmarks, modifiers, associated diagnoses).
This summary is intended for billing professionals, vascular specialists, and policy analysts seeking a focused, national-level overview of CPT code 37256, its clinical scope, and its relevance to payer coverage and procedural classification.
Billing Code Overview
CPT code 37256 describes angioplasty (balloon expansion) of a complex lesion in an initial iliac artery. The procedure addresses a significant narrowing or complete occlusion in the iliac vascular territory, which includes the common iliac, internal iliac, and external iliac arteries. The service encompasses all access, catheterization, lesion crossing, and imaging guidance required to complete the intervention. The approach may be percutaneous or open.
Service type: Endovascular/surgical peripheral vascular intervention (iliac artery angioplasty for complex occlusive disease)
Typical site of service: Hospital-based vascular lab, interventional radiology suite, or operating room
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with progressive left lower-extremity claudication and diminished pedal pulses is evaluated for peripheral arterial disease. Noninvasive vascular testing (ankle-brachial index, duplex ultrasound) suggests an inflow lesion in the left iliac artery. Cross-sectional imaging or diagnostic peripheral angiography confirms a high-grade stenosis with near-occlusion of the left external iliac artery. The vascular interventionalist schedules a percutaneous transluminal angioplasty of the iliac occlusion with possible stent placement.
The patient arrives to an outpatient endovascular suite or hospital catheterization laboratory after pre-procedure evaluation (consent, medication reconciliation, anticoagulation management). Under conscious sedation or general anesthesia, vascular access is obtained (common femoral or brachial access). Catheter-based angiography is performed to define the lesion. Endovascular crossing techniques are used to traverse the occlusion, and balloons are used for balloon angioplasty of the complex iliac lesion. Imaging guidance (fluoroscopy and angiographic runs) and hemostasis at access completion are included. The procedure may be converted to open surgical exposure if needed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
-26 | Professional component | When billing only the physician interpretation portion of a separately reportable imaging study tied to the procedure. |