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Official Description

Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; synovectomy, partial

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Surgical arthroscopy of the ankle, specifically involving the tibiotalar and fibulotalar joints, is a minimally invasive procedure that focuses on the synovectomy, which is the partial removal of the synovial membrane. The synovial membrane is a specialized tissue that lines the ankle joint and is responsible for producing synovial fluid, which lubricates the joint and facilitates smooth movement. In certain conditions, such as rheumatoid arthritis or synovial proliferative disorders, this membrane can become inflamed, leading to an overproduction of synovial fluid. This excess fluid can cause joint effusion, resulting in pain, swelling, and reduced mobility. The procedure is performed with the patient positioned to allow optimal access to the ankle joint, utilizing an L-shaped bar for support. The surgical technique involves creating portals for the insertion of an arthroscope and surgical instruments, allowing for direct visualization and intervention within the joint space. The goal of the synovectomy is to alleviate symptoms by removing the inflamed synovial tissue while preserving the integrity of surrounding structures, such as blood vessels and nerves. This procedure is essential for patients suffering from chronic joint issues related to synovial inflammation, aiming to improve joint function and reduce discomfort.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure of partial synovectomy via arthroscopy of the ankle is indicated for several specific conditions that lead to inflammation of the synovial membrane. These include:

  • Rheumatoid Arthritis - A chronic inflammatory disorder that affects the joints, leading to synovial inflammation and excess fluid production.
  • Synovial Proliferative Disorder - A condition characterized by the abnormal growth of synovial tissue, which can cause joint swelling and pain.
  • Joint Effusion - The accumulation of excess synovial fluid in the joint space, often resulting from inflammation or injury.

2. Procedure

The procedure for performing a partial synovectomy through arthroscopy of the ankle involves several key steps:

  • Step 1: Patient Positioning - The patient is positioned with the leg resting on an L-shaped bar, ensuring that the thigh is supported while the knee is bent. This positioning allows the lower leg to swing freely, facilitating access to the ankle joint.
  • Step 2: Ankle Joint Preparation - The foot is secured in a device known as a bracelet, and the ankle joint is distracted to create space for the procedure. This distraction helps in visualizing the joint more clearly during the arthroscopy.
  • Step 3: Joint Access - A needle is inserted into the anteromedial aspect of the joint to inflate it with saline, which helps in distending the joint space. After inflation, the needle is withdrawn, and an anteromedial portal is created for further access.
  • Step 4: Insertion of Arthroscope - A trocar is placed in the anteromedial portal, and the arthroscope is inserted through this trocar. This allows the surgeon to visualize the interior of the joint and assess it for any signs of injury, disease, or infection.
  • Step 5: Creation of Anterolateral Portal - An additional portal, known as the anterolateral portal, is created to facilitate the surgical intervention.
  • Step 6: Synovial Tissue Removal - A motorized shaver is utilized to carefully remove the inflamed synovial tissue. It is crucial to resect all affected tissue while avoiding damage to the underlying vascular and nervous structures.
  • Step 7: Joint Flushing - After the synovectomy is completed, the joint is flushed with saline to clear any remaining debris from the surgical site.
  • Step 8: Closure - Finally, the arthroscope and surgical instruments are removed, and the portal incisions are closed to complete the procedure.

3. Post-Procedure

Post-procedure care following a partial synovectomy of the ankle typically involves monitoring for any signs of complications, such as infection or excessive swelling. Patients may be advised to rest the affected ankle and limit weight-bearing activities for a specified period to promote healing. Physical therapy may be recommended to restore range of motion and strength in the joint. Follow-up appointments are essential to assess recovery and ensure that the joint is healing properly.

Short Descr ANKLE ARTHROSCOPY/SURGERY
Medium Descr ARTHROSCOPY ANKLE SURGICAL SYNOVECTOMY PARTIAL
Long Descr Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; synovectomy, partial
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) P8A - Endoscopy - arthroscopy
MUE 1
CCS Clinical Classification 162 - Other OR therapeutic procedures on joints
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).
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
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
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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