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Official Description

Open subclavian to carotid artery transposition performed in conjunction with endovascular repair of descending thoracic aorta, by neck incision, unilateral

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 33889 involves an open surgical technique for transposing the subclavian artery to the carotid artery. This operation is performed in conjunction with an endovascular repair of the descending thoracic aorta, utilizing a unilateral neck incision. The procedure begins with an incision in the neck, which is then extended toward the arm, allowing access to the supraclavicular space. During the surgery, the carotid and subclavian arteries are carefully exposed through meticulous soft tissue dissection, ensuring that surrounding vessels and nerves are mobilized and protected throughout the process. The subclavian artery is dissected beneath the clavicle, with the goal of exposing it as close to the aorta as possible. This careful dissection is crucial for the subsequent steps of the procedure, which involve controlling the arteries and performing anastomosis. The use of anticoagulants and vascular clamps is integral to managing blood flow and preventing complications during the surgery. Ultimately, the procedure aims to facilitate proper blood flow from the common carotid artery to the subclavian artery, ensuring that the vascular system remains functional and effective following the repair of the thoracic aorta.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The open subclavian to carotid artery transposition procedure, as described by CPT® Code 33889, is indicated for patients requiring surgical intervention in conjunction with endovascular repair of the descending thoracic aorta. This may include conditions such as:

  • Aortic Aneurysm - A dilation of the descending thoracic aorta that may necessitate repair to prevent rupture.
  • Aortic Dissection - A serious condition where there is a tear in the aorta's inner layer, requiring surgical correction.
  • Subclavian Artery Stenosis - Narrowing of the subclavian artery that may impair blood flow and require surgical intervention.

2. Procedure

The procedure involves several critical steps to ensure successful transposition of the subclavian artery to the carotid artery:

  • Step 1: Incision - A neck incision is made and extended toward the arm, providing access to the supraclavicular space.
  • Step 2: Exposure of Arteries - The carotid and subclavian arteries are exposed through careful soft tissue dissection, ensuring that surrounding vessels and nerves are protected.
  • Step 3: Dissection of Subclavian Artery - The subclavian artery is dissected under the clavicle, with the aim of exposing it as close to the aorta as possible.
  • Step 4: Control of Arteries - Soft rubber loops are passed proximally and distally to control the arteries, followed by the administration of an anticoagulant intravenously.
  • Step 5: Clamping and Division - Proximal and distal clamps are applied to the subclavian artery, which is then divided, and the proximal stump is oversewn.
  • Step 6: Bleeding Control - The proximal clamp is released, and additional sutures are placed as needed to control any bleeding.
  • Step 7: Clamping Common Carotid Artery - The common carotid artery is clamped proximally and distally to facilitate the anastomosis.
  • Step 8: Anastomosis - The subclavian artery is mobilized, and the common carotid artery is incised. The subclavian artery is then anastomosed to the common carotid artery in an end-to-side fashion.
  • Step 9: Release of Clamps - Vascular clamps are released, and additional sutures are placed as necessary to ensure hemostasis.
  • Step 10: Confirmation of Blood Flow - Pulses are checked, and blood flow is confirmed using Doppler ultrasound before closing the incision.
  • Step 11: Closure - The neck incision is closed, completing the procedure.

3. Post-Procedure

After the completion of the open subclavian to carotid artery transposition, patients typically require monitoring for any signs of complications, such as bleeding or infection at the incision site. Recovery may involve pain management and observation of vascular function to ensure that blood flow is adequate. Follow-up appointments are essential to assess the surgical site and the success of the anastomosis, as well as to monitor for any potential issues related to the endovascular repair of the descending thoracic aorta.

Short Descr ARTERY TRANSPOSE/ENDOVAS TAA
Medium Descr OPN SUBCLA CRTD ART TRPOS NCK INC ULAT
Long Descr Open subclavian to carotid artery transposition performed in conjunction with endovascular repair of descending thoracic aorta, by neck incision, unilateral
Status Code Active Code
Global Days 000 - Endoscopic or Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
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) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 59 - Other OR procedures on vessels of head and neck
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
CR Catastrophe/disaster related
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)
RT Right side (used to identify procedures performed on the right side of the body)
Date
Action
Notes
2006-01-01 Added First appearance in code book in 2006.
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