36200

Introduction of Catheter, Aorta

CPT code 36200 describes the introduction of a catheter into the aorta, representing a fundamental procedure in interventional radiology and vascular surgery. This code identifies a non-selective catheter placement, meaning the catheter is positioned within the lumen of the aorta itself—including the ascending aorta, aortic arch, and descending thoracic or abdominal aorta—and has not been navigated into any of its primary, secondary, or tertiary branch vessels. The procedure typically begins with the selection of a vascular access site, most commonly the common femoral artery, though the radial, brachial, or axillary arteries may be utilized depending on the clinical context and patient anatomy. Under local anesthesia and often with sedation, the clinician performs a percutaneous puncture using the Seldinger technique, involving the insertion of a hollow needle into the vessel followed by the passage of a flexible guidewire. A catheter is then advanced over the wire into the aorta under fluoroscopic guidance. The clinical utility of 36200 is broad; it serves as a prerequisite for more complex selective catheterizations and is frequently utilized for diagnostic aortography to visualize the integrity of the vessel wall, identify aneurysmal dilation, detect dissections, or assess stenotic lesions. It is also a critical foundational step in endovascular aneurysm repair (EVAR) and thoracic endovascular aortic repair (TEVAR). The placement must be documented carefully, as the transition from the aorta into a branch vessel (such as the renal artery or the common carotid) shifts the coding logic to selective catheterization codes (36215-36248), which would typically bundle the 36200 component if performed through the same access. This code specifically accounts for the technical work of accessing the arterial system and positioning the catheter within the main aortic trunk.

Clinical Indications

  • Abdominal aortic aneurysm (AAA) evaluation
  • Thoracic aortic aneurysm (TAA) evaluation
  • Aortic dissection assessment
  • Atherosclerotic disease of the aorta
  • Preoperative mapping before cardiac or vascular surgery
  • Evaluation of aortic coarctation or other congenital malformations
  • Traumatic aortic injury
  • Planning for endovascular stent-graft placement
  • Vasculitis such as Takayasu arteritis
  • Unexplained mesenteric or lower extremity ischemia requiring central imaging

Procedure Steps

  1. Obtain informed consent and perform pre-procedural site marking and safety checklist.
  2. Position the patient and prepare the access site (usually femoral, radial, or brachial) with antiseptic solution and sterile draping.
  3. Administer local anesthesia to the puncture site.
  4. Perform percutaneous arterial puncture using a needle and the Seldinger technique.
  5. Insert a guidewire through the needle into the arterial lumen and advance it into the aorta under fluoroscopic guidance.
  6. Remove the needle while maintaining guidewire position and, if necessary, use a dilator to expand the subcutaneous tract.
  7. Advance the catheter over the guidewire until the tip is positioned in the desired segment of the aorta (ascending, arch, or descending).
  8. Confirm catheter tip position via fluoroscopy or a test injection of contrast media.
  9. Perform necessary diagnostic imaging or use the position as a base for further selective navigation.
  10. Remove the catheter and guidewire upon completion and achieve hemostasis at the puncture site via manual pressure or a closure device.

Coding Guidelines

  • 36200 is a non-selective catheterization code; it should not be reported if a more intensive selective catheterization (e.g., 36215, 36245) is performed from the same access site during the same session.
  • The code includes the work of the arterial puncture, catheter introduction, and advancement into the aorta.
  • Imaging supervision and interpretation (S&I) codes for aortography (e.g., 75600, 75605, 75625, 75630) should be reported separately in conjunction with 36200.
  • If multiple access sites are used (e.g., both right and left femoral arteries) to reach the aorta for distinct clinical reasons, modifier 59 or XS may be appropriate.
  • When performed with other procedures that are not bundled, use modifier 51 if applicable depending on payer rules.
  • Always document the final position of the catheter tip to justify the use of a non-selective versus selective code.

Associated ICD-10 Codes