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Official Description

Placement of distal extension prosthesis(s) (delayed) after endovascular repair of descending thoracic aorta, as needed, to level of celiac origin, radiological supervision and interpretation

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 75959 refers to the placement of a distal extension prosthesis in a delayed manner following an endovascular repair of the descending thoracic aorta. This procedure is performed as necessary to reach the level of the celiac origin and involves comprehensive radiological supervision and interpretation. During this process, a series of imaging techniques are utilized to ensure the accurate placement and functionality of the prosthesis. The procedure begins with angiography of the aorta and its branches, which is essential for visualizing the vascular anatomy prior to the deployment of the endovascular extension prosthesis. Fluoroscopic guidance is employed throughout the procedure, facilitating the precise placement of guidewires, catheters, and the prosthesis itself. Additionally, intraprocedural angiography is conducted to confirm the correct positioning of the prosthesis, identify any potential endoleaks, and assess the blood flow in the surrounding vessels. A road-mapping angiography is also performed to provide a detailed view of the aortic anatomy before the delivery of the extension prosthesis. After the prosthesis is deployed, a post-deployment aortogram is carried out to evaluate the position of the extension prosthesis, check for endoleaks, and ensure the patency of the aorta. The physician is responsible for providing a written interpretation of all angiographic and fluoroscopic imaging conducted during the procedure. It is important to note that CPT® Code 75958 is used for radiological supervision and interpretation related to the placement of a proximal extension prosthesis, while CPT® Code 75959 is specifically designated for the distal extension prosthesis placement.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The placement of a distal extension prosthesis after endovascular repair of the descending thoracic aorta is indicated for specific clinical scenarios. These indications may include:

  • Endovascular Repair Necessity The procedure is performed when there is a need to extend the repair of the descending thoracic aorta to ensure adequate coverage and support of the aortic anatomy.
  • Complications from Previous Repairs It may be indicated in cases where complications arise from previous endovascular repairs, necessitating the placement of a distal extension prosthesis to address issues such as endoleaks or inadequate sealing.
  • Anatomical Considerations The procedure is indicated when anatomical factors, such as the level of the celiac origin, require the extension of the prosthesis to maintain proper blood flow and vascular integrity.

2. Procedure

The procedure for the placement of a distal extension prosthesis involves several critical steps, each designed to ensure the successful deployment and functionality of the prosthesis. The steps include:

  • Step 1: Pre-Procedure Imaging Prior to the placement of the distal extension prosthesis, angiography of the aorta and its branches is performed. This imaging is crucial for assessing the vascular anatomy and planning the procedure effectively.
  • Step 2: Road-Mapping Angiography A road-mapping angiography is conducted to obtain a detailed view of the aortic anatomy. This step aids in visualizing the path for the delivery of the extension prosthesis and ensures accurate placement.
  • Step 3: Fluoroscopic Guidance Throughout the procedure, fluoroscopic guidance is utilized. This involves real-time imaging to assist in the placement of guidewires, catheters, and the prosthesis itself, ensuring precision during the deployment process.
  • Step 4: Deployment of the Prosthesis The distal extension prosthesis is delivered to the designated location within the descending thoracic aorta. Fluoroscopic guidance is employed during this step to facilitate accurate positioning.
  • Step 5: Balloon Dilation If necessary, balloon dilation is performed to properly seat the extension prosthesis. Fluoroscopic guidance is again utilized to ensure the correct placement and expansion of the prosthesis.
  • Step 6: Post-Deployment Aortogram After the prosthesis is deployed, a post-deployment aortogram is performed. This imaging is essential for evaluating the position of the extension prosthesis, checking for any endoleaks, and verifying the patency of the aorta.
  • Step 7: Documentation Finally, the physician provides a written interpretation of all angiographic and fluoroscopic imaging conducted during the procedure, ensuring comprehensive documentation of the process and findings.

3. Post-Procedure

Post-procedure care following the placement of a distal extension prosthesis includes monitoring for any complications, such as endoleaks or changes in blood flow. Patients may require follow-up imaging to assess the position and functionality of the prosthesis. The physician will review the results of the post-deployment aortogram and provide necessary instructions for recovery and any further interventions if needed. Continuous assessment of the patient's condition is essential to ensure the success of the procedure and to address any potential issues promptly.

Short Descr XRAY PLACE DIST EXT THOR AO
Medium Descr PLMT DSTL XTN PRSTH EVASC DESC THORAC AORTA RS&I
Long Descr Placement of distal extension prosthesis(s) (delayed) after endovascular repair of descending thoracic aorta, as needed, to level of celiac origin, radiological supervision and interpretation
Status Code Carriers Price the Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 4 - Diagnostic Radiology
Berenson-Eggers TOS (BETOS) I4B - Imaging/procedure - other
MUE 1
CCS Clinical Classification 191 - Arterio- or venogram (not heart and head)

This is a primary code that can be used with these additional add-on codes.

37252 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; initial noncoronary vessel (List separately in addition to code for primary procedure)
37253 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; each additional noncoronary vessel (List separately in addition to code for primary procedure)
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2013-01-01 Changed Medium descriptor changed per AMA 2013 corrections document.
2011-01-01 Changed Short description changed.
2006-01-01 Added First appearance in code book in 2006.
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