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Official Description

Arrest, epiphyseal (epiphysiodesis), any method, combined, proximal and distal tibia and fibula; and distal femur

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

Epiphyseal arrest, also known as epiphysiodesis, is a surgical procedure aimed at addressing discrepancies in bone length, particularly between the lower legs, specifically the tibia and fibula. The term "epiphysis" refers to the growth plate, which is a critical area of developing bone tissue that influences the length and shape of the bones as a child grows. In the context of CPT® Code 27742, this procedure involves a combined approach where epiphyseal arrest is performed not only on the proximal and distal aspects of the tibia and fibula but also includes the distal femur. The surgical technique requires careful incision and dissection of soft tissues to expose the bones while safeguarding surrounding blood vessels and nerves. The use of devices such as Blount staples, transphyseal screws, or plates and screws is integral to the procedure, as these are placed in the epiphyses to temporarily halt further bone growth, thereby correcting the length discrepancy. This procedure is particularly relevant in pediatric orthopedics, where growth-related issues are common, and it is essential for achieving proper limb alignment and function as the child matures.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

Epiphyseal arrest is indicated for the treatment of conditions that result in a bone length discrepancy between the lower legs, specifically between the tibia and fibula. This discrepancy can lead to functional impairments and aesthetic concerns, necessitating surgical intervention to promote proper limb alignment and growth. The procedure is particularly relevant in pediatric patients who are still growing, as it aims to correct or prevent further discrepancies in bone length that may arise due to various developmental issues.

  • Bone Length Discrepancy The primary indication for epiphyseal arrest is to address a significant difference in length between the tibia and fibula, which can affect mobility and overall function.
  • Growth Plate Abnormalities Conditions affecting the growth plates, such as congenital deformities or trauma, may necessitate this procedure to ensure proper growth and alignment.
  • Leg Length Inequality Patients with leg length inequality due to various underlying conditions may benefit from this surgical intervention to achieve a more balanced limb length.

2. Procedure

The procedure for epiphyseal arrest involves several critical steps to ensure successful outcomes. First, the surgeon makes incisions over the proximal and distal aspects of both the tibia and fibula. These incisions allow access to the underlying bone structures while minimizing damage to surrounding tissues. Following the incisions, the surgeon carefully dissects the soft tissues, taking special care to protect vital blood vessels and nerves that are adjacent to the surgical site. Once the soft tissues are adequately dissected, the proximal and distal tibia and fibula are exposed, providing a clear view of the growth plates. At this stage, the surgeon employs specific devices, such as Blount staples, transphyseal screws, or a plate and screw device, which are strategically placed in the epiphyses of the proximal and distal tibia and fibula. These devices are designed to temporarily arrest bone growth, effectively halting further lengthening of the bones. In the case of CPT® Code 27742, the procedure is extended to include the distal femur, ensuring comprehensive treatment of the limb length discrepancy.

  • Step 1: Incision The surgeon initiates the procedure by making incisions over the proximal and distal tibia and fibula to gain access to the underlying bone structures.
  • Step 2: Soft Tissue Dissection Careful dissection of the soft tissues is performed to expose the bones while protecting surrounding blood vessels and nerves.
  • Step 3: Bone Exposure The proximal and distal tibia and fibula are exposed, allowing for the placement of devices that will arrest bone growth.
  • Step 4: Device Placement Blount staples, transphyseal screws, or a plate and screw device are strategically placed in the epiphyses to temporarily halt further bone growth.
  • Step 5: Inclusion of Distal Femur For CPT® Code 27742, the procedure also includes epiphyseal arrest on the distal femur, in addition to the tibia and fibula.

3. Post-Procedure

After the epiphyseal arrest procedure, patients typically require careful monitoring and follow-up care to ensure proper healing and recovery. Post-operative care may include pain management, wound care, and restrictions on weight-bearing activities to allow the surgical sites to heal adequately. Patients are often advised to engage in physical therapy to promote mobility and strengthen the surrounding muscles. The expected recovery time can vary depending on the individual patient's condition and the extent of the surgery performed. Regular follow-up appointments are essential to assess the success of the procedure and to monitor for any potential complications, such as infection or improper healing of the growth plates.

Short Descr REPAIR OF LEG EPIPHYSES
Medium Descr ARRST EPIPHYSL ANY METH TIBFIB&DSTL FEMUR
Long Descr Arrest, epiphyseal (epiphysiodesis), any method, combined, proximal and distal tibia and fibula; and distal femur
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) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 161 - Other OR therapeutic procedures on bone
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