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Official Description

Bypass graft, with other than vein; axillary-femoral

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An axillary-femoral bypass graft, coded as CPT® 35621, is a surgical procedure designed to reroute blood flow around a diseased or obstructed segment of the aorta, iliac, or femoral artery using a synthetic graft rather than a vein. This procedure is indicated when there is significant arterial blockage that impairs blood circulation, potentially leading to complications such as limb ischemia. The operation begins with a skin incision made in the chest area, just below the clavicle, allowing access to the proximal axillary artery. A second incision is then made in the groin region over the common femoral artery or in the leg over the popliteal or tibial artery, facilitating exposure of the affected arteries. The surgeon creates a tunnel that connects the axillary artery to the common femoral artery, or extends to the popliteal or tibial artery if an axillary-popliteal/-tibial bypass is performed. A synthetic graft is selected and sutured to the axillary artery, then passed through the tunnel to connect with the distal artery. This procedure is critical for restoring adequate blood flow to the lower extremities, thereby improving patient outcomes and quality of life.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The axillary-femoral bypass graft procedure is indicated for patients experiencing significant arterial obstruction or disease that affects blood flow in the aorta, iliac, or femoral arteries. The following conditions may warrant this surgical intervention:

  • Arterial Occlusion - Presence of blockages in the arteries that impede normal blood flow.
  • Peripheral Artery Disease (PAD) - A condition characterized by narrowed arteries reducing blood flow to the limbs.
  • Ischemic Limb Pain - Pain in the limbs due to inadequate blood supply, often exacerbated by physical activity.
  • Critical Limb Ischemia - Severe obstruction of blood flow to the extremities, leading to potential tissue loss.

2. Procedure

The axillary-femoral bypass graft procedure involves several critical steps to ensure successful rerouting of blood flow. The following outlines the procedural steps:

  • Step 1: Incision and Exposure - A skin incision is made in the chest, just below the clavicle, to access the proximal axillary artery. Soft tissue is carefully dissected to expose the artery. A second incision is made in the groin area over the common femoral artery or in the leg over the popliteal or tibial artery, allowing for further access to the vascular structures.
  • Step 2: Tunnel Creation - A tunnel is created that begins at the exposed axillary artery and extends down through the chest and abdomen, passing under the inguinal ligament. This tunnel terminates at the exposed section of the common femoral artery for an axillary-femoral bypass. If an axillary-popliteal/-tibial bypass is indicated, the tunnel is extended along the leg to reach the popliteal or tibial artery.
  • Step 3: Graft Preparation - An appropriately sized tubular synthetic graft is selected and prepared for implantation. This graft will serve as the conduit for blood flow.
  • Step 4: Graft Attachment - Vascular clamps are applied to the axillary artery, and an incision is made in the artery. The synthetic graft is then sutured to the axillary artery. Following this, the graft is passed through the previously created tunnel.
  • Step 5: Connection to Distal Artery - The common femoral, popliteal, or iliac artery is clamped and incised, and the graft is sutured to this artery to establish a new pathway for blood flow.
  • Step 6: Final Checks - After the graft is secured, the vascular clamps are removed. Blood flow through the graft is assessed using Doppler ultrasound, and distal pulses are evaluated to ensure the patency of the bypass graft.

3. Post-Procedure

Post-procedure care for patients undergoing an axillary-femoral bypass graft includes monitoring for any signs of complications such as infection, graft failure, or thrombosis. Patients are typically observed in a recovery area where vital signs are closely monitored. Pain management is provided as needed, and patients may be advised on mobility restrictions to promote healing. Follow-up appointments are essential to assess the graft's function and ensure adequate blood flow to the lower extremities. Rehabilitation may be recommended to improve overall vascular health and physical function.

Short Descr ART BYP AXILLARY-FEMORAL
Medium Descr BYP OTH/THN VEIN AXILLARY-FEMORAL
Long Descr Bypass graft, with other than vein; axillary-femoral
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) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 55 - Peripheral vascular bypass
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.
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
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).
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.
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)
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
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Notes
2013-01-01 Changed Short Descriptor changed.
Pre-1990 Added Code added.
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