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Official Description

Transfer or transplant of single tendon (with muscle redirection or rerouting); deep (eg, anterior tibial or posterior tibial through interosseous space, flexor digitorum longus, flexor hallucis longus, or peroneal tendon to midfoot or hindfoot)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 27691 involves the transfer or transplant of a single deep tendon in the lower leg, specifically targeting tendons such as the anterior tibial or posterior tibial tendon. This surgical intervention is typically performed to restore function that may have been compromised due to traumatic injuries affecting the nerve, tendon, or muscle. In some cases, the loss of function may also arise from conditions like rheumatoid arthritis or gouty arthritis. The complexity of the procedure can vary based on the specific function that the surgeon aims to restore. Unlike the superficial tendon transfers, which are categorized under CPT® Code 27690, the deep tendon transfer requires more intricate dissection of deeper tissues to facilitate the rerouting of the tendon to the designated recipient site. The procedure is essential for patients who have experienced significant loss of mobility or function in the foot or ankle, and it involves careful planning and execution to ensure optimal outcomes. The surgical technique includes making incisions to access the donor tendon, freeing it from its attachments, and securing it at the recipient site, all while ensuring that the tendon is adequately tensioned for effective function post-surgery.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The transfer or transplant of a single deep tendon, as described by CPT® Code 27691, is indicated for various conditions that result in loss of function in the lower leg. The primary indications include:

  • Traumatic Injury: Loss of function due to damage to the nerve, tendon, or muscle resulting from an accident or injury.
  • Rheumatoid Arthritis: A chronic inflammatory disorder that can lead to tendon dysfunction and loss of mobility.
  • Gouty Arthritis: A type of arthritis characterized by sudden, severe attacks of pain, swelling, and tenderness in the joints, which may affect tendon function.

2. Procedure

The procedure for the transfer or transplant of a single deep tendon involves several critical steps to ensure successful rerouting and restoration of function. The steps include:

  • Step 1: Incision Over Donor Tendon A longitudinal incision is made over the donor tendon to expose it adequately. This allows the surgeon to access the tendon and prepare it for transfer.
  • Step 2: Freeing the Donor Tendon The donor tendon is carefully freed from its attachments, which may include detaching it from surrounding tissues. This process may involve harvesting the tendon along with a strip of periosteum to ensure it can be securely attached to the recipient site.
  • Step 3: Mobilizing the Muscle The muscle associated with the donor tendon is also freed from fascial attachments. This step is crucial to provide maximum mobility and length for the tendon transfer, allowing for optimal positioning at the recipient site.
  • Step 4: Incision Over Recipient Site A second incision is made over the recipient site, where the donor tendon will be attached. This site is carefully selected based on the specific functional restoration required.
  • Step 5: Routing the Donor Tendon The donor tendon is routed to the recipient site. Temporary sutures are used to secure the tendon in place during the initial assessment of its function.
  • Step 6: Testing Function A neuromuscular stimulator is employed to test the function of the donor tendon. This step is essential to ensure that the tendon is functioning correctly before finalizing the attachment.
  • Step 7: Securing the Tendon The tension of the donor tendon is adjusted as necessary to ensure maximum function. Once the optimal tension is achieved, the tendon is permanently secured at the recipient site.
  • Step 8: Closure and Immobilization After the surgical wounds are closed, the ankle and foot may be immobilized as needed to promote healing and protect the surgical site during recovery.

3. Post-Procedure

Post-procedure care following the transfer or transplant of a single deep tendon involves monitoring the surgical site for any signs of complications, such as infection or improper healing. Patients are typically advised to keep the ankle and foot immobilized to ensure proper healing of the tendon and surrounding tissues. Rehabilitation may be necessary to restore function and strength, and physical therapy may be recommended to guide the patient through exercises that promote recovery. The duration of recovery can vary based on individual circumstances, including the extent of the surgery and the patient's overall health. Regular follow-up appointments are essential to assess the healing process and make any necessary adjustments to the rehabilitation plan.

Short Descr REVISE LOWER LEG TENDON
Medium Descr TR/TRNSPL 1 TDN W/MUSC REDIRION/REROUTING DP
Long Descr Transfer or transplant of single tendon (with muscle redirection or rerouting); deep (eg, anterior tibial or posterior tibial through interosseous space, flexor digitorum longus, flexor hallucis longus, or peroneal tendon to midfoot or hindfoot)
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 Hospital Part B services paid through a comprehensive APC
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) P5B - Ambulatory procedures - musculoskeletal
MUE 2
CCS Clinical Classification 160 - Other therapeutic procedures on muscles and tendons

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

27692 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Illustration for Code Transfer or transplant of single tendon (with muscle redirection or rerouting); each additional tendon (List separately in addition to code for primary procedure)
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)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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).
GC This service has been performed in part by a resident under the direction of a teaching physician
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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).
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.
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.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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.)
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
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).
AI Principal physician of record
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
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
ER Items and services furnished by a provider-based, off-campus emergency department
F1 Left hand, second digit
GW Service not related to the hospice patient's terminal condition
SA Nurse practitioner rendering service in collaboration with a physician
SG Ambulatory surgical center (asc) facility service
T1 Left foot, second digit
T2 Left foot, third digit
T3 Left foot, fourth digit
T4 Left foot, fifth digit
T5 Right foot, great toe
T6 Right foot, second digit
T7 Right foot, third digit
T8 Right foot, fourth digit
TA Left foot, great toe
TL Early intervention/individualized family service plan (ifsp)
X3 Episodic/broad services: for reporting services by clinicians who have broad responsibility for the comprehensive needs of the patient that is limited to a defined period and circumstance such as a hospitalization; reporting clinician service examples include but are not limited to the hospitalist's services rendered providing comprehensive and general care to a patient while admitted to the hospital
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
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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