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Official Description

Arthroscopy, shoulder, surgical; synovectomy, partial

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Arthroscopy of the shoulder is a minimally invasive surgical procedure that allows for the examination and treatment of various shoulder joint conditions. The specific procedure described by CPT® Code 29820 involves a partial synovectomy, which is the surgical removal of a portion of the synovial membrane that lines the shoulder joint. This procedure is typically indicated for patients suffering from synovial disease, which may include conditions such as synovitis or other inflammatory processes affecting the synovial tissue. During the procedure, the patient is positioned either in a lateral decubitus position, where they lie on their side with the affected arm suspended, or in a beach chair position, which allows for optimal access to the shoulder joint. The use of skin traction helps to stabilize the arm and improve visibility during the surgery. The procedure begins with the creation of small incisions, known as portal incisions, through which an infusion pump is used to introduce sterile saline solution into the joint space, facilitating a clearer view of the internal structures. Following a diagnostic assessment, the surgeon can then proceed to remove the affected synovial tissue using specialized surgical instruments. This technique not only alleviates symptoms but also aims to restore function to the shoulder joint by addressing the underlying synovial pathology.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Arthroscopy, shoulder, surgical; synovectomy, partial (CPT® Code 29820) is indicated for the following conditions:

  • Synovitis - Inflammation of the synovial membrane, which can cause pain and swelling in the shoulder joint.
  • Synovial Disease - Various disorders affecting the synovial tissue, leading to joint dysfunction and discomfort.
  • Joint Pain - Persistent pain in the shoulder that may be attributed to synovial abnormalities.
  • Limited Range of Motion - Difficulty in moving the shoulder joint due to synovial tissue issues.

2. Procedure

The procedure for a partial synovectomy of the shoulder involves several key steps:

  • Step 1: Patient Positioning - The patient is positioned in either a lateral decubitus position or a beach chair position to provide optimal access to the shoulder joint. In the lateral decubitus position, the affected arm is suspended to enhance visibility and access.
  • Step 2: Portal Incision Creation - Anterior and posterior portal incisions are made over the shoulder joint. These small incisions allow for the introduction of surgical instruments and the arthroscope.
  • Step 3: Joint Distension - Sterile saline solution is infused into the shoulder joint using an infusion pump. This distension of the joint space improves visualization of the internal structures during the procedure.
  • Step 4: Diagnostic Arthroscopy - A diagnostic arthroscopy is performed to assess the condition of the shoulder joint and to explore any synovial disease or defects present.
  • Step 5: Additional Portal Incisions - If necessary, additional portal incisions are made to facilitate access to the surgical site and to introduce specialized surgical tools.
  • Step 6: Synovial Resection - The synovial membrane is removed using a resector, which is a specialized instrument designed for this purpose. This step is crucial for addressing the underlying pathology.
  • Step 7: Hemostasis - Any bleeding that occurs during the procedure is controlled using radiofrequency or electrocautery techniques to ensure a clear surgical field.
  • Step 8: Closure and Dressing - Once the damaged synovium has been resected, the saline solution is drained from the shoulder joint. The incisions are then closed, and a sterile dressing is applied to protect the surgical site.

3. Post-Procedure

After the partial synovectomy procedure, patients can expect a recovery period that may involve pain management and rehabilitation. Post-operative care typically includes monitoring for any signs of infection at the incision sites, managing pain with prescribed medications, and following a physical therapy regimen to restore range of motion and strength in the shoulder. Patients are advised to avoid strenuous activities and heavy lifting during the initial recovery phase to ensure proper healing. Follow-up appointments are essential to assess the surgical outcome and to make any necessary adjustments to the rehabilitation plan.

Short Descr SHO ARTHRS SRG PRTL SYNVCT
Medium Descr SURGICAL ARTHROSCOPY SHOULDER PRTL SYNOVECTOMY
Long Descr Arthroscopy, shoulder, surgical; synovectomy, partial
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 29805  Arthroscopy, shoulder, 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

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

29826 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Arthroscopy, shoulder, surgical; decompression of subacromial space with partial acromioplasty, with coracoacromial ligament (ie, arch) release, when performed (List separately in addition to code for primary procedure)
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.
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).
RT Right side (used to identify procedures performed on the right side of the body)
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).
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.
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)
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
Date
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2021-01-01 Changed Short and medium descriptions changed.
Pre-1990 Added Code added.
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