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Official Description

Open repair of infrarenal aortic aneurysm or dissection, plus repair of associated arterial trauma, following unsuccessful endovascular repair; aorto-bi-iliac prosthesis

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 34831 refers to the open surgical repair of an infrarenal aortic aneurysm or dissection, which is a serious condition characterized by the abnormal dilation or tearing of the aorta located below the renal arteries. This procedure is specifically indicated for cases where previous endovascular repair attempts have failed. Such failures may result in complications like endoleaks, which are leaks of blood into the aneurysm sac, dissection, which is a tear in the aortic wall, or occlusion of major aortic branches that can impede blood flow to vital organs. The surgical approach involves making an abdominal incision to access the aorta and the iliac or femoral vessels, allowing the surgeon to directly visualize and repair the affected areas. The procedure also includes the repair of any associated arterial trauma that may have occurred during the initial endovascular repair attempt. The use of an aorto-bi-iliac prosthesis is a critical component of this repair, as it provides a stable conduit for blood flow following the removal of the aneurysm or dissection. This comprehensive approach aims to restore normal vascular function and prevent further complications associated with aortic aneurysms or dissections.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The open repair of an infrarenal aortic aneurysm or dissection, as described by CPT® Code 34831, is indicated in the following scenarios:

  • Unsuccessful Endovascular Repair This procedure is performed when previous attempts at endovascular repair have failed, leading to complications that necessitate a more invasive surgical approach.
  • Endoleaks The presence of endoleaks, which are leaks of blood into the aneurysm sac that can occur after endovascular repair, may require open surgical intervention to correct.
  • Aortic Dissection If there is a dissection of the aorta, which is a tear in the aortic wall, open repair may be necessary to restore the integrity of the aorta.
  • Occlusion of Major Aortic Branches Any occlusion of major aortic branches that affects blood flow to vital organs may warrant this surgical procedure to restore proper circulation.
  • Occlusion of Aortic or Iliac Blood Flow Situations where there is occlusion of blood flow in the aorta or iliac arteries, potentially leading to ischemia, may also indicate the need for this repair.

2. Procedure

The open repair procedure for an infrarenal aortic aneurysm or dissection involves several critical steps, as outlined below:

  • Step 1: Abdominal Incision The procedure begins with the surgeon making an abdominal incision to gain access to the aorta and the iliac or femoral vessels. This incision allows for direct visualization and manipulation of the vascular structures involved.
  • Step 2: Exposure of Vessels The aorta and iliac/femoral vessels are carefully exposed to points above and below the level of the prosthesis. This exposure is essential for the subsequent steps of the repair.
  • Step 3: Administration of Heparin Intravenous heparin is administered to prevent blood clotting during the procedure. This anticoagulation is crucial for maintaining vascular patency while the repair is being performed.
  • Step 4: Placement of Vascular Clamps Vascular clamps are placed on the aorta and iliac/femoral vessels to control blood flow and create a bloodless field for the repair.
  • Step 5: Opening the Aneurysm The aneurysm is then opened, and any thrombus, or blood clot, within the aneurysm sac is removed to facilitate the repair process.
  • Step 6: Removal of Endograft Pieces If there are any lodged pieces of the previously placed endograft, these are carefully removed to ensure a clean surgical field and to prevent complications.
  • Step 7: Suturing the Prosthesis The aorto-bi-iliac prosthesis is sutured to the untraumatized aorta above the aneurysm at the proximal end. This step is critical for re-establishing normal blood flow through the aorta.
  • Step 8: Checking Vascular Flow After suturing, vascular flow is checked to ensure that blood is flowing properly through the newly placed prosthesis. Additional sutures are placed as needed to secure the prosthesis.
  • Step 9: Repairing the Distal End The distal end of the prosthesis in the aorta or iliac/femoral artery(s) is repaired in a similar fashion, with checks for vascular flow and additional suturing as necessary.
  • Step 10: Final Steps Once all repairs are completed, vascular clamps are removed, anticoagulation is reversed, and any bleeding is controlled. Finally, the surgical wound is closed to complete the procedure.

3. Post-Procedure

Post-procedure care following the open repair of an infrarenal aortic aneurysm or dissection includes monitoring for any complications that may arise from the surgery. Patients are typically observed for signs of bleeding, infection, or graft-related issues. Pain management is also an important aspect of post-operative care. Patients may require follow-up imaging studies to assess the integrity of the repair and ensure that there are no complications such as endoleaks or occlusions. The recovery period may vary depending on the individual patient's health status and the complexity of the procedure, but close monitoring and follow-up appointments are essential to ensure a successful recovery.

Short Descr OPEN AORTOILIAC PROSTH REPR
Medium Descr OPN RPR ARYSM RPR ARTL TRMA AORTOBIILIAC PROSTH
Long Descr Open repair of infrarenal aortic aneurysm or dissection, plus repair of associated arterial trauma, following unsuccessful endovascular repair; aorto-bi-iliac prosthesis
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard 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) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 2 - Co-surgeons permitted and no documentation required if the two- specialty requirement is met.
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) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 52 - Aortic resection, replacement or anastomosis
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
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.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
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
LT Left side (used to identify procedures performed on the left side of the body)
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
Date
Action
Notes
2001-01-01 Added First appearance in code book in 2001.
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