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Official Description

Osteotomy, clavicle, with or without internal fixation; with bone graft for nonunion or malunion (includes obtaining graft and/or necessary fixation)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An osteotomy of the clavicle, as described by CPT® Code 23485, is a surgical procedure aimed at correcting structural issues of the clavicle, particularly in cases of malunion or nonunion. Malunion refers to the improper healing of a fractured bone, while nonunion indicates that the bone has failed to heal altogether. This procedure may also be indicated for chronic dislocation of the sternoclavicular joint. The osteotomy involves making precise cuts in the clavicle to realign it properly. The specific location of the osteotomy is determined based on the underlying condition being treated. In this procedure, bone grafting is utilized to facilitate healing and ensure proper bone integration. The graft can be harvested from the patient’s own body, often from the iliac crest, or it may be obtained from another site. The surgical technique includes creating drill holes, making horizontal and vertical cuts to form a Z-osteotomy, and securing the bone with sutures or internal fixation devices. This comprehensive approach aims to restore the normal anatomy and function of the clavicle, ultimately improving patient outcomes.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The osteotomy of the clavicle with bone grafting, as described by CPT® Code 23485, is indicated for specific conditions that compromise the integrity and function of the clavicle. These indications include:

  • Malunion - This occurs when a fractured clavicle heals in an incorrect position, leading to functional impairment and discomfort.
  • Nonunion - This condition is characterized by the failure of the clavicle to heal after a fracture, necessitating surgical intervention to promote healing.
  • Chronic dislocation of the sternoclavicular joint - This condition may require surgical correction to restore normal joint function and alleviate pain.

2. Procedure

The procedure for an osteotomy of the clavicle with bone grafting involves several critical steps to ensure successful outcomes. The following procedural steps are outlined:

  • Step 1: Skin Incision - A skin incision is made over the planned osteotomy site on the clavicle. This incision allows access to the underlying bone for the surgical procedure.
  • Step 2: Exposure of the Clavicle - The clavicle is carefully exposed to provide a clear view of the area where the osteotomy will be performed. This step is crucial for ensuring precision during the surgery.
  • Step 3: Creation of Drill Holes - Drill holes are created at the lateral and medial aspects of the planned osteotomy site. These holes will guide the subsequent cuts and assist in securing the bone after the osteotomy.
  • Step 4: Horizontal Bone Cut - A horizontal cut is made between the two drill holes, which serves as the primary cut for the osteotomy.
  • Step 5: Vertical Cuts for Z-Osteotomy - Vertical cuts are made at the inferomedial and superolateral aspects of the horizontal cut. This technique forms a Z-osteotomy, which allows for better alignment and stabilization of the clavicle.
  • Step 6: Lengthening the Clavicle - The clavicle is lengthened by sliding the cut edges apart, which helps to correct the malunion or nonunion.
  • Step 7: Securing the Bone - Holes are drilled on each side of the lateral cuts, and sutures are threaded through these holes to secure the bones in their new position. Alternatively, internal fixation devices such as screws or plates may be used to stabilize the osteotomy site.
  • Step 8: Bone Grafting - Bone is harvested either locally or from a separate site, such as the iliac crest. The harvested bone graft is then prepared and placed at the site of the malunion or nonunion to promote healing.
  • Step 9: Closure of the Surgical Wound - The surgical wound is closed in layers to ensure proper healing, and a dressing is applied to protect the site.

3. Post-Procedure

After the osteotomy and bone grafting procedure, patients can expect specific post-operative care and recovery considerations. The surgical site will require monitoring for signs of infection and proper healing. Patients may be advised to limit movement of the shoulder and arm to allow for adequate recovery. Pain management strategies will be implemented to ensure comfort during the healing process. Follow-up appointments will be necessary to assess the healing of the bone graft and the alignment of the clavicle. Rehabilitation exercises may be introduced gradually to restore function and strength to the shoulder area as healing progresses.

Short Descr REVISION OF COLLAR BONE
Medium Descr OSTEOTOMY CLAV W/WO INT FIXJ W/BONE GRF NON/MAL
Long Descr Osteotomy, clavicle, with or without internal fixation; with bone graft for nonunion or malunion (includes obtaining graft and/or necessary fixation)
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

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

20703 Add-on Code MPFS Status: Active Code APC N Removal of drug-delivery device(s), intramedullary (List separately in addition to code for primary procedure)
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.
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).
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.)
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)
SG Ambulatory surgical center (asc) facility service
Date
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Notes
2013-01-01 Changed Medium Descriptor changed.
Pre-1990 Added Code added.
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