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Official Description

Placement of proximal extension prosthesis for endovascular repair of descending thoracic aorta (eg, aneurysm, pseudoaneurysm, dissection, penetrating ulcer, intramural hematoma, or traumatic disruption), radiological supervision and interpretation

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 75958 refers to the placement of a proximal extension prosthesis specifically for the endovascular repair of the descending thoracic aorta. This procedure is indicated for various conditions affecting the aorta, including aneurysms, pseudoaneurysms, dissections, penetrating ulcers, intramural hematomas, or traumatic disruptions. The procedure involves the use of advanced imaging techniques, particularly radiological supervision and interpretation, to ensure accurate placement and functionality of the prosthesis. During the procedure, comprehensive imaging is conducted, which includes angiography of the aorta and its branches prior to the deployment of the endovascular extension prosthesis. This imaging is crucial for visualizing the aortic anatomy and planning the intervention. The use of fluoroscopic guidance throughout the procedure aids in the precise placement of guidewires, catheters, and the prosthesis itself. Additionally, intraprocedural angiography is performed to confirm the correct positioning of the prosthesis, detect any potential endoleaks, and evaluate blood flow. A post-deployment aortogram is also conducted to assess 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 performed during the procedure, ensuring comprehensive documentation and analysis of the intervention.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The placement of a proximal extension prosthesis for endovascular repair of the descending thoracic aorta is indicated for the following conditions:

  • Aneurysm - A localized enlargement of the aorta that can lead to rupture if not treated.
  • Pseudoaneurysm - An abnormal bulging that resembles an aneurysm but is not a true aneurysm, often resulting from a breach in the arterial wall.
  • Dissection - A serious condition where there is a tear in the inner layer of the aorta, allowing blood to flow between the layers of the artery wall.
  • Pentrating Ulcer - A condition where an ulcer penetrates the aortic wall, potentially leading to serious complications.
  • Intramural Hematoma - A collection of blood within the wall of the aorta, which can compromise the integrity of the vessel.
  • Traumatic Disruption - Injury to the aorta resulting from trauma, which may necessitate repair to restore normal function.

2. Procedure

The procedure for the placement of a proximal extension prosthesis involves several critical steps to ensure successful endovascular repair of the descending thoracic aorta:

  • Step 1: Pre-Procedure Imaging - Prior to the deployment of the extension prosthesis, angiography of the aorta and its branches is performed. This imaging is essential for assessing the anatomy and planning the intervention.
  • Step 2: Road-Mapping Angiography - A road-mapping angiography is obtained to visualize the aortic anatomy in real-time, which aids in guiding the placement of the prosthesis.
  • Step 3: Fluoroscopic Guidance - Throughout the procedure, fluoroscopic guidance is utilized to assist in the placement of guidewires, catheters, and the prosthesis itself. This real-time imaging ensures accurate positioning.
  • Step 4: Balloon Dilation - If necessary, balloon dilation is performed to properly seat the extension prosthesis within the aorta, ensuring a secure fit.
  • Step 5: Intraprocedural Angiography - Intraprocedural angiography is conducted to confirm the position of the prosthesis, detect any endoleaks, and evaluate the blood flow through the aorta.
  • Step 6: Post-Deployment Aortogram - After the prosthesis is deployed, a post-deployment aortogram is performed to evaluate the position of the extension prosthesis, check for endoleaks, and verify the patency of the aorta.

3. Post-Procedure

Following the procedure, careful monitoring is essential to assess the patient's recovery and the functionality of the placed prosthesis. The physician will review the written interpretation of all angiographic and fluoroscopic imaging to ensure that the procedure was successful and that there are no complications such as endoleaks. Patients may require follow-up imaging studies to monitor the aorta and the prosthesis over time, ensuring ongoing patency and stability. Any signs of complications or changes in the patient's condition should be addressed promptly to maintain optimal outcomes.

Short Descr XRAY PLACE PROX EXT THOR AO
Medium Descr PLMT PROX XTN PRSTH EVASC DESC THORAC AORTA RS&I
Long Descr Placement of proximal extension prosthesis for endovascular repair of descending thoracic aorta (eg, aneurysm, pseudoaneurysm, dissection, penetrating ulcer, intramural hematoma, or traumatic disruption), 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 2
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.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
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)
GC This service has been performed in part by a resident under the direction of a teaching physician
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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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