37220

Revascularization, endovascular, open or percutaneous, iliac artery, unilateral, initial vessel; with transluminal angioplasty

This CPT code describes an endovascular procedure performed to restore blood flow in a stenotic or occluded iliac artery (common iliac, internal iliac, or external iliac artery). The procedure addresses the initial unilateral iliac artery. Access can be achieved either through an open surgical cutdown or a percutaneous approach. The core technique involves transluminal angioplasty, where a balloon catheter is advanced to the narrowed segment and inflated to dilate the artery, thereby improving arterial lumen size and blood flow to the lower extremity and pelvis. This procedure is typically performed for symptomatic peripheral artery disease.

Clinical Indications

  • Symptomatic iliac artery stenosis or occlusion causing claudication (intermittent leg pain) that significantly impacts quality of life or occupational function, refractory to conservative medical management.
  • Rest pain in the lower extremity attributed to severe iliac artery disease.
  • Non-healing ischemic ulcers or wounds of the lower extremity due to compromised iliac artery flow.
  • Tissue loss or gangrene in the lower extremity secondary to critical limb ischemia stemming from iliac artery disease.
  • Acute limb ischemia caused by iliac artery occlusion when endovascular intervention is deemed appropriate and feasible.
  • Pre-operative optimization of iliac inflow prior to distal lower extremity revascularization procedures.

Procedure Steps

  1. Patient positioning and preparation, including sterile draping and administration of local anesthetic, conscious sedation, or general anesthesia.
  2. Vascular access obtained, typically via the common femoral artery, through a percutaneous puncture or surgical cutdown.
  3. Introduction of a guide wire and sheath into the arterial system.
  4. Under fluoroscopic guidance, a diagnostic catheter is advanced to the iliac artery to perform angiography and confirm the lesion characteristics.
  5. A guide wire is carefully advanced through the stenotic or occluded segment of the iliac artery.
  6. An appropriately sized angioplasty balloon catheter is threaded over the guide wire and positioned across the lesion.
  7. The balloon is inflated to dilate the narrowed arterial segment, potentially with multiple inflations.
  8. Repeat angiography is performed to assess the technical success of the angioplasty, including residual stenosis and flow characteristics.
  9. Removal of catheters, wires, and sheath.
  10. Achieving hemostasis at the access site using manual compression, a vascular closure device, or surgical repair.

Coding Guidelines

  • Code 37220 describes revascularization of the initial unilateral iliac artery using transluminal angioplasty. If a stent is also placed in the same iliac artery during the same session, code 37221 (with stent) should be reported instead, as angioplasty is inherent to stent placement.
  • This code is unilateral. If the contralateral iliac artery is treated in the same session, it would generally be reported separately using 37220 or 37221, potentially with a modifier to indicate a separate procedure (e.g., modifier 50 for bilateral procedures if applicable to the payor, or modifiers RT/LT if for separate anatomical sides).
  • Diagnostic angiography performed by the same physician immediately prior to the interventional procedure in the same vascular family is typically considered bundled into the interventional code and not separately reported, unless distinct and separately identifiable diagnostic services are provided and documented (e.g., a planned staged procedure or decision for intervention made after diagnostic study).
  • Radiological supervision and interpretation are included in the CPT code 37220 and should not be reported separately.
  • This code typically has a 0-day global period.
  • Thorough documentation is essential, including the medical necessity for the procedure, specific artery treated (e.g., right common iliac artery), pre- and post-procedure angiographic findings, and details of the angioplasty technique.

Associated ICD-10 Codes