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Official Description

Synovectomy, extensor tendon sheath, wrist, single compartment;

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 25118 refers to a synovectomy of the extensor tendon sheath in the wrist, specifically targeting a single compartment. A synovectomy is a surgical intervention aimed at removing inflamed synovial tissue, which is the lining of the joint that can become swollen and painful due to various conditions, most notably rheumatoid arthritis. This inflammation can lead to discomfort and impaired function of the wrist, necessitating surgical intervention to alleviate symptoms and restore mobility. During the procedure, an incision is made on the posterior aspect of the wrist to access the affected area. The dorsal retinaculum, a fibrous band that stabilizes the extensor tendons, is carefully exposed, allowing the surgeon to make transverse incisions at both the proximal and distal borders. A longitudinal incision is then created through the sixth compartment, which houses the extensor carpi ulnaris tendon. This careful dissection enables the surgeon to elevate and displace the retinaculum radially, providing clear visibility and access to the inflamed extensor tendon compartment. The procedure culminates in the exploration of the affected compartment, where all inflamed synovial tissue is meticulously removed using a motorized suction shaving device. This code is specifically utilized when the synovectomy is performed on a single compartment, distinguishing it from CPT® Code 25119, which is used when the procedure includes resection of the distal ulna.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The synovectomy procedure described by CPT® Code 25118 is indicated for patients experiencing inflammation of the synovial tissue within the extensor tendon sheath of the wrist. This inflammation is often associated with conditions such as:

  • Rheumatoid Arthritis A chronic inflammatory disorder that affects joints, leading to swelling and pain.
  • Other Inflammatory Conditions Various other conditions that may cause synovial inflammation and necessitate surgical intervention.

2. Procedure

The procedure for synovectomy of the extensor tendon sheath in the wrist involves several detailed steps:

  • Step 1: An incision is made over the posterior aspect of the wrist to access the affected area. This initial incision is crucial for providing the necessary exposure to the underlying structures.
  • Step 2: The dorsal retinaculum is then exposed. This fibrous band plays a significant role in stabilizing the extensor tendons, and careful dissection is required to avoid damaging surrounding tissues.
  • Step 3: Transverse incisions are made at the proximal and distal borders of the retinaculum. These incisions facilitate further access to the extensor tendon sheath.
  • Step 4: A longitudinal incision is created through the sixth compartment, which contains the extensor carpi ulnaris tendon. This step is essential for directly accessing the inflamed synovial tissue.
  • Step 5: The retinaculum is elevated and displaced radially. This maneuver allows for optimal exposure of the affected extensor tendon compartment, ensuring that the surgeon can effectively visualize the inflamed tissue.
  • Step 6: The affected compartment is thoroughly explored. The surgeon inspects the area to identify all inflamed synovial tissue that requires removal.
  • Step 7: All inflamed synovial tissue is excised using a motorized suction shaving device. This technique aids in the efficient removal of tissue while minimizing trauma to surrounding structures.

3. Post-Procedure

After the synovectomy procedure, patients can expect a recovery period that may involve monitoring for any signs of complications, such as infection or excessive swelling. Post-operative care typically includes pain management, immobilization of the wrist to promote healing, and a gradual return to normal activities as advised by the healthcare provider. Rehabilitation exercises may be recommended to restore range of motion and strength in the wrist following the procedure. The specific recovery timeline can vary based on individual patient factors and the extent of the surgery performed.

Short Descr EXCISE WRIST TENDON SHEATH
Medium Descr SYNOVECTOMY EXTENSOR TENDON SHTH WRIST 1 CMPRT
Long Descr Synovectomy, extensor tendon sheath, wrist, single compartment;
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) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
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) P3D - Major procedure, orthopedic - other
MUE 5
CCS Clinical Classification 162 - Other OR therapeutic procedures on joints
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)
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.
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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.
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).
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).
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
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).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
F1 Left hand, second digit
F2 Left hand, third digit
F3 Left hand, fourth digit
F4 Left hand, fifth digit
F5 Right hand, thumb
F6 Right hand, second digit
F7 Right hand, third digit
F8 Right hand, fourth digit
F9 Right hand, fifth digit
FA Left hand, thumb
GC This service has been performed in part by a resident under the direction of a teaching physician
SG Ambulatory surgical center (asc) facility service
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
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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2010-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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