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Official Description

Arthroscopy, wrist, surgical; synovectomy, complete

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Surgical arthroscopy of the wrist is a minimally invasive procedure that involves the examination and treatment of the wrist joint through small incisions. The specific procedure described by CPT® Code 29845 refers to a complete synovectomy, which is the surgical removal of the synovial tissue that lines the joint. This procedure is typically indicated for patients suffering from conditions that cause inflammation of the synovial tissue, such as rheumatoid arthritis. During the procedure, the patient is positioned supine, and a pneumatic tourniquet is applied to the upper arm to minimize blood flow to the area, enhancing visibility and control during surgery. The use of a wrist traction device allows for distraction of the wrist joint, facilitating a clearer view of the internal structures. The arthroscope, a specialized camera, is inserted through a small incision, enabling the surgeon to visualize the joint and identify inflamed tissue. The complete removal of this tissue is essential for alleviating symptoms and improving joint function. This procedure is distinct from a partial synovectomy, which is performed when only a portion of the synovial tissue is removed, and is coded differently (CPT® Code 29844).

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 29845 is indicated for the following conditions:

  • Rheumatoid Arthritis - A chronic inflammatory disorder that affects the synovial tissue, leading to pain and swelling in the joints.
  • Synovitis - Inflammation of the synovial membrane, which can cause joint pain and swelling.
  • Other Inflammatory Joint Conditions - Conditions that result in inflammation of the synovial tissue, necessitating surgical intervention to relieve symptoms.

2. Procedure

The procedure for a complete synovectomy of the wrist involves several key steps:

  • Step 1: Patient Positioning - The patient is placed in a supine position with the shoulder abducted to allow optimal access to the wrist. This positioning is crucial for the surgeon to perform the procedure effectively.
  • Step 2: Application of Pneumatic Tourniquet - A pneumatic tourniquet is applied to the upper arm to restrict blood flow to the wrist. This helps to minimize bleeding during the procedure and enhances visibility of the surgical field.
  • Step 3: Wrist Traction Setup - The forearm is suspended in a wrist traction device, and weights of 7-10 lbs are applied to the second and third fingers. This distraction of the wrist joint allows for better visualization of the joint structures during the arthroscopy.
  • Step 4: Portal Incision and Arthroscope Introduction - A portal incision is made over the posterior aspect of the wrist, and the arthroscope is introduced through this incision. This instrument provides a visual guide for the surgeon to examine the joint.
  • Step 5: Cannula Insertion - Another portal incision is made to introduce a cannula, which allows for the passage of surgical instruments and facilitates the removal of inflamed tissue.
  • Step 6: Examination and Synovial Tissue Removal - The wrist joint is thoroughly examined, and all inflamed synovial tissue is removed using a motorized suction shaving device. This step is critical for alleviating symptoms associated with the underlying condition.
  • Step 7: Additional Portal Incisions - If necessary, additional portal incisions are made to access the midcarpal joint, allowing for the removal of any remaining inflamed tissue in the same manner.
  • Step 8: Joint Flushing and Closure - Upon completion of the synovectomy, the joint is flushed with normal saline to clear any debris. The arthroscope and surgical instruments are then removed, and the portal incisions are closed to complete the procedure.

3. Post-Procedure

After the completion of the synovectomy, the patient may require monitoring for any immediate complications. Post-procedure care typically includes pain management and instructions for activity restrictions to promote healing. Patients are often advised to keep the wrist elevated and may be prescribed physical therapy to restore function and mobility. Follow-up appointments are essential to assess recovery and ensure that the joint is healing properly.

Short Descr WRIST ARTHROSCOPY/SURGERY
Medium Descr ARTHROSCOPY WRIST SURGICAL SYNOVECTOMY COMPLETE
Long Descr Arthroscopy, wrist, surgical; synovectomy, complete
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 3 - Special payment adjustment rules for multiple endoscopic 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.
Endoscopic Base Code 29840  Arthroscopy, wrist, diagnostic, with or without synovial biopsy (separate 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
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).
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).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
F5 Right hand, thumb
FA Left hand, thumb
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
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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