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Official Description

Bypass graft, with vein; brachial-ulnar or -radial

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A bypass graft procedure, specifically coded as CPT® 35523, involves the surgical replacement of a stenotic or occluded segment of an artery in the arm, extending from the brachial artery to either the ulnar or radial artery, using a venous graft. This procedure is typically indicated for patients suffering from chronic arterial occlusive disease and ischemia of the upper extremity, conditions that may arise due to factors such as immunosuppression or renal failure. The surgical approach begins with an incision in the upper arm to access the brachial artery, followed by careful dissection of the surrounding soft tissue to expose the artery adequately. Rubber loops are then placed around the artery to isolate it, facilitating the subsequent steps of the procedure. The surgeon then proceeds to the lower arm, making an incision over the ulnar or radial artery, usually at the wrist, to expose the selected artery for grafting. A segment of saphenous vein is harvested from the leg to serve as the bypass graft. The procedure culminates with the suturing of the venous graft to the brachial artery and the selected ulnar or radial artery, ensuring proper blood flow and patency through careful verification techniques such as Doppler ultrasound and palpation of distal pulses.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The bypass graft procedure coded as CPT® 35523 is indicated for the following conditions:

  • Chronic Arterial Occlusive Disease - A condition characterized by the narrowing or blockage of arteries, leading to reduced blood flow to the upper extremities.
  • Ischemia of the Upper Extremity - A state where there is insufficient blood supply to the arm, which can result in pain, weakness, or tissue damage.
  • Immunosuppression - Patients with weakened immune systems may experience vascular complications that necessitate surgical intervention.
  • Renal Failure - Individuals with kidney failure may develop vascular issues that require bypass grafting to restore adequate blood flow.

2. Procedure

The procedure for a bypass graft using vein, specifically from the brachial artery to the ulnar or radial artery, involves several critical steps:

  • Step 1: Incision and Exposure - An incision is made in the upper arm over the brachial artery to provide access. The surgeon carefully dissects the soft tissue surrounding the artery for several centimeters to ensure adequate exposure.
  • Step 2: Isolation of the Brachial Artery - Rubber loops are placed around the brachial artery to isolate it from surrounding structures, allowing for a clear working area for the subsequent steps.
  • Step 3: Accessing the Ulnar or Radial Artery - The surgeon then directs attention to the lower arm, making an incision over the ulnar or radial artery, typically at the wrist. This incision allows for the exposure of the selected artery.
  • Step 4: Dissection of the Selected Artery - A section of the ulnar or radial artery is carefully dissected free from soft tissue and isolated using soft rubber loops to prepare for the graft connection.
  • Step 5: Harvesting the Saphenous Vein - A segment of saphenous vein is harvested from the leg, which will serve as the bypass graft to replace the occluded artery segment.
  • Step 6: Grafting Procedure - Vascular clamps are applied to the brachial artery, which is then incised. The harvested venous graft is sutured to the brachial artery, establishing a new pathway for blood flow.
  • Step 7: Connecting the Graft - The graft is tunneled through to the ulnar or radial artery. An incision is made in the selected artery, and the graft is cut to the appropriate length before being sutured to the artery.
  • Step 8: Final Checks - After the graft is secured, vascular clamps are removed. The surgeon verifies hemostasis and checks the patency of the graft using Doppler ultrasound and by palpating distal pulses to ensure adequate blood flow.

3. Post-Procedure

Post-procedure care for patients undergoing a bypass graft includes monitoring for any signs of complications such as infection, graft failure, or bleeding. Patients are typically observed for a period to ensure stable vital signs and adequate blood flow to the extremities. Follow-up appointments are essential to assess the graft's patency and the overall recovery process. Rehabilitation may be recommended to improve arm function and circulation, depending on the patient's condition and recovery progress.

Short Descr ART BYP GRFT BRCHL-ULNR-RDL
Medium Descr BYPASS W/VEIN BRACHIAL-ULNAR/-RADIAL
Long Descr Bypass graft, with vein; brachial-ulnar or -radial
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) 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) 1 - Co-surgeons could be paid, though supporting documentation is required...
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) P2B - Major procedure, cardiovascular-Aneurysm repair
MUE 1
CCS Clinical Classification 55 - Peripheral vascular bypass

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

35572 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Illustration for Code Harvest of femoropopliteal vein, 1 segment, for vascular reconstruction procedure (eg, aortic, vena caval, coronary, peripheral artery) (List separately in addition to code for primary procedure)
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.
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).
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)
RT Right side (used to identify procedures performed on the right side of the body)
Date
Action
Notes
2013-01-01 Changed Short Descriptor changed.
2008-01-01 Added First appearance in code book in 2008.
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