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Official Description

Flap; island pedicle requiring identification and dissection of an anatomically named axial vessel

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An island pedicle flap, as described by CPT® Code 15740, is a surgical procedure that involves the creation of a flap of tissue that retains its blood supply through an anatomically named axial vessel. This technique is essential for covering tissue defects, which may arise from trauma, surgical excision, or other medical conditions. The procedure begins with an incision through the skin and underlying subcutaneous tissues, typically made in a V or Y configuration, to facilitate the creation of the flap. The key aspect of this procedure is the identification and preservation of the axial vessel, which is crucial for maintaining the viability of the flap. Once the vessel is located, the dissection continues to mobilize the flap, allowing it to be transferred from the donor site to the recipient site. The flap can be advanced over the defect, which may require techniques such as rotation or tunneling beneath adjacent tissues to ensure proper coverage. After positioning the flap, it is secured with sutures, and any secondary defects created during the flap's transfer are also repaired. This meticulous approach ensures that the tissue defect is effectively covered while maintaining the integrity of the surrounding structures.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 15740 is indicated for various conditions that necessitate the coverage of tissue defects. These may include:

  • Trauma The need to repair skin and underlying tissue following an injury that results in a defect.
  • Surgical Excision Coverage required after the removal of tumors or other pathological tissue that leaves a defect.
  • Chronic Wounds Management of non-healing wounds that require additional tissue for closure.
  • Congenital Defects Correction of tissue deficiencies present at birth that require surgical intervention.

2. Procedure

The procedure for creating an island pedicle flap involves several critical steps, which are detailed as follows:

  • Step 1: Incision The surgeon begins by making an incision in the skin and underlying subcutaneous tissues, typically in a V or Y configuration. This design is chosen to facilitate the creation of the flap while allowing for optimal blood supply and tissue mobility.
  • Step 2: Identification of Axial Vessel During the dissection, the surgeon identifies the anatomically named axial vessel that will supply blood to the flap. This step is crucial as it ensures that the flap remains viable after being transferred to the recipient site.
  • Step 3: Mobilization of the Flap The dissection continues to carefully mobilize the tissue flap along with the identified axial vessel. This mobilization is essential for allowing the flap to be advanced over the defect without compromising its blood supply.
  • Step 4: Advancement of the Flap Once adequately mobilized, the island pedicle flap is advanced over the tissue defect. This may involve techniques such as rotating the flap or tunneling it beneath adjacent tissues to reach the defect site effectively.
  • Step 5: Securing the Flap After positioning the flap over the primary tissue defect, the surgeon secures it in place using sutures. This step is vital for ensuring that the flap adheres properly and maintains its position during the healing process.
  • Step 6: Repair of Secondary Defect Finally, the secondary defect created by the flap's transfer is also repaired, ensuring that the overall aesthetic and functional integrity of the area is restored.

3. Post-Procedure

Post-procedure care for an island pedicle flap involves monitoring the flap for signs of viability, such as color changes and temperature. Patients may be advised to keep the area clean and dry, and to follow specific wound care instructions provided by the surgeon. Pain management may be necessary, and follow-up appointments will be scheduled to assess healing and address any complications that may arise. The expected recovery time can vary based on the individual patient and the extent of the procedure, but careful adherence to post-operative instructions is crucial for optimal healing and flap success.

Short Descr ISLAND PEDICLE FLAP GRAFT
Medium Descr FLAP ISLAND PEDICLE ANATOMIC NAMED AXIAL ARTERY
Long Descr Flap; island pedicle requiring identification and dissection of an anatomically named axial vessel
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) 1 - Statutory 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 Procedure or Service, Multiple Reduction Applies
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5A - Ambulatory procedures - skin
MUE 2
CCS Clinical Classification 175 - Other OR therapeutic procedures on skin and breast

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

20701 Add-on Code MPFS Status: Active Code APC N Removal of drug-delivery device(s), deep (eg, subfascial) (List separately in addition to code for primary procedure)
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).
SG Ambulatory surgical center (asc) facility service
GC This service has been performed in part by a resident under the direction of a teaching physician
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.
RT Right side (used to identify procedures performed on the right side of the body)
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.)
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.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient 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.
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.)
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).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
E3 Upper right, eyelid
E4 Lower right, eyelid
F1 Left hand, second digit
F2 Left hand, third digit
F8 Right hand, fourth digit
FA Left hand, thumb
GW Service not related to the hospice patient's terminal condition
LT Left side (used to identify procedures performed on the left side of the body)
T7 Right foot, third digit
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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2013-01-01 Changed Description Changed
Pre-1990 Added Code added.
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