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Official Description

Arthroplasty, temporomandibular joint, with prosthetic joint replacement

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 21243 refers to arthroplasty of the temporomandibular joint (TMJ) involving the replacement of the joint with a prosthetic device. This surgical intervention is typically indicated for patients suffering from severe TMJ disorders, which may include chronic pain, limited jaw movement, or structural abnormalities of the joint. The surgery aims to alleviate symptoms and restore function by replacing damaged or diseased components of the TMJ with artificial materials. The procedure involves making incisions near the ear and potentially below the jaw to access the joint, allowing the surgeon to remove the affected parts and implant the prosthetic joint. The use of screws to secure the prosthetic to the remaining bone structure ensures stability and proper alignment, which is crucial for the successful integration of the implant and the restoration of normal jaw function. Following the procedure, careful closure of the incisions is performed to promote healing and minimize scarring.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 21243 is indicated for various conditions affecting the temporomandibular joint. These may include:

  • Severe TMJ Disorders Chronic pain and dysfunction in the TMJ that does not respond to conservative treatments.
  • Joint Degeneration Significant wear and tear of the joint surfaces, often due to arthritis or other degenerative conditions.
  • Structural Abnormalities Congenital or acquired deformities of the TMJ that impair function and cause discomfort.
  • Trauma Injuries to the TMJ resulting in fractures or dislocations that compromise joint integrity.

2. Procedure

The surgical procedure for CPT® Code 21243 involves several critical steps to ensure successful arthroplasty of the temporomandibular joint.

  • Step 1: Incision The surgeon begins by making an incision near the ear, which provides access to the temporomandibular joint. In some cases, an additional incision may be made below the jaw to enhance visibility and access to the joint structures.
  • Step 2: Joint Exposure Once the incisions are made, the surgeon carefully dissects through the surrounding tissues to expose the temporomandibular joint. This step is crucial for visualizing the joint components that need to be replaced.
  • Step 3: Removal of Damaged Structures The surgeon then removes the damaged or diseased parts of the joint, including the fossa above the condyle and the condyle itself, which are often the primary areas affected in TMJ disorders.
  • Step 4: Prosthetic Placement After the removal of the affected joint components, a prosthetic joint is prepared and positioned in place of the removed structures. The prosthetic is designed to mimic the natural anatomy and function of the TMJ.
  • Step 5: Securing the Prosthetic The prosthetic joint is secured to the remaining condylar neck using screws, ensuring stability and proper alignment within the joint space.
  • Step 6: Closure Finally, the surgeon meticulously closes all incisions, ensuring that the tissues are properly aligned to promote healing and minimize scarring.

3. Post-Procedure

After the completion of the arthroplasty procedure, patients typically undergo a recovery period that may involve monitoring for any complications, managing pain, and beginning rehabilitation exercises to restore jaw function. Post-operative care may include prescribed medications for pain management and inflammation, as well as instructions for activity restrictions to allow for proper healing. Follow-up appointments are essential to assess the healing process and the functionality of the prosthetic joint. Patients are advised to adhere to the surgeon's recommendations regarding diet, oral hygiene, and physical therapy to optimize recovery outcomes.

Short Descr RECONSTRUCTION OF JAW JOINT
Medium Descr ARTHRP TMPRMAND JOINT W/PROSTHETIC REPLACEMENT
Long Descr Arthroplasty, temporomandibular joint, with prosthetic joint replacement
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 154 - Arthroplasty other than hip or knee
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.
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.
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
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
GC This service has been performed in part by a resident under the direction of a teaching physician
GZ Item or service expected to be denied as not reasonable and necessary
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)
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