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Official Description

Osteotomy; tibia

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An osteotomy of the tibia involves the surgical procedure of cutting and reshaping the tibial bone to correct deformities or to realign the bone structure. This procedure may also involve the fibula, depending on the specific deformity being addressed. The term 'osteotomy' refers to the surgical cutting of bone, and in this context, it is specifically applied to the tibial and/or fibular shafts and/or distal regions of these bones. The choice of the osteotomy type—such as transverse, wedge, sliding, right or left angle, V-osteotomy, or Z-osteotomy—is determined by the nature and location of the deformity. Prior to the surgery, the physician utilizes radiographic studies to precisely plan the bone cuts necessary to achieve the desired alignment and correction. The surgical approach begins with an incision over the lower leg, followed by careful dissection of the soft tissues to expose the tibia and fibula. The periosteum, which is the connective tissue surrounding the bone, is elevated to allow access to the bone itself. The actual osteotomy is performed using surgical instruments such as drills, saws, or osteotomes to create the necessary bone cuts. In some cases, bone grafts may be inserted between the cut segments to promote healing and stability. To ensure that the bone segments remain properly aligned during the healing process, various fixation methods, including pins, screws, or plates, may be employed. Alternatively, an external fixation device can be used if deemed appropriate. This procedure is coded as CPT® Code 27705 when performed on the tibia alone, while CPT® Code 27707 is used for the fibula alone, and CPT® Code 27709 is applicable for osteotomies involving both the tibia and fibula.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The osteotomy of the tibia is indicated for various conditions that necessitate correction of bone deformities or realignment. The following are specific indications for this procedure:

  • Deformity Correction The procedure is performed to correct angular deformities of the tibia or fibula, which may result from congenital conditions, trauma, or previous surgeries.
  • Realignment of Bone Osteotomy is indicated when there is a need to realign the bone structure to restore proper function and biomechanics of the lower extremity.
  • Osteoarthritis Management In some cases, osteotomy may be indicated as a treatment option for osteoarthritis, particularly in younger patients, to delay the need for joint replacement.
  • Leg Length Discrepancy The procedure may be indicated to address discrepancies in leg length that can lead to functional impairments or discomfort.

2. Procedure

The osteotomy procedure involves several critical steps to ensure successful correction of the deformity. The following outlines the procedural steps:

  • Step 1: Preoperative Planning Prior to the surgical intervention, the physician conducts radiographic studies to determine the precise location and configuration of the osteotomy. This planning is essential to achieve the desired alignment and correction of the deformity.
  • Step 2: Incision and Exposure An incision is made over the lower leg to access the tibia and fibula. The surgeon carefully dissects the soft tissues to expose the bones, ensuring minimal damage to surrounding structures.
  • Step 3: Elevation of the Periosteum The periosteum, a fibrous membrane covering the bones, is elevated to provide access to the bone surface for the osteotomy.
  • Step 4: Bone Cutting Using surgical instruments such as a drill, saw, or osteotome, the surgeon performs the osteotomy according to the pre-determined configuration. This step is critical for achieving the desired correction of the deformity.
  • Step 5: Bone Grafting (if necessary) If indicated, bone grafts may be interposed between the cut bone segments to facilitate healing and stability of the osteotomy site.
  • Step 6: Internal or External Fixation The final step involves securing the cut edges of the bone in anatomical alignment using internal fixation devices such as pins, screws, or plates. Alternatively, an external fixation device may be applied if deemed appropriate for the case.

3. Post-Procedure

After the osteotomy procedure, the patient will require careful monitoring and post-operative care to ensure proper healing and recovery. The expected recovery process includes pain management, physical therapy, and follow-up appointments to assess the healing of the bone. Patients may be advised to limit weight-bearing activities on the affected leg for a specified period, depending on the extent of the procedure and the surgeon's recommendations. Rehabilitation exercises will typically be introduced gradually to restore mobility and strength. It is essential for patients to adhere to the post-operative care instructions provided by their healthcare team to optimize recovery outcomes.

Short Descr OSTEOTOMY TIBIA
Medium Descr OSTEOTOMY TIBIA
Long Descr Osteotomy; tibia
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 Device-intensive procedure added to ASC list in CY 2008 or later; paid at adjusted rate.
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
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.
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).
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
ET Emergency services
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)
SG Ambulatory surgical center (asc) facility service
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
Date
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2025-01-01 Changed Short Description changed.
Pre-1990 Added Code added.
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