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Official Description

Excision distal ulna partial or complete (eg, Darrach type or matched resection)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 25240 involves the excision of the distal ulna, which can be either partial or complete. This surgical intervention is typically performed to address various conditions affecting the wrist, particularly those related to the distal ulna's anatomy and function. The term "Darrach type" refers to a specific method of excision that may be employed during the procedure, indicating a technique that focuses on the distal ulna's removal while preserving surrounding structures when feasible. The procedure begins with an incision made over the posterior aspect of the wrist, allowing access to the dorsal retinaculum, which is a fibrous band that stabilizes the extensor tendons. The surgical approach includes making transverse incisions at both the proximal and distal borders of the retinaculum, followed by a longitudinal incision through the sixth compartment, which houses the extensor carpi ulnaris tendon. Careful dissection is crucial to expose the distal ulna while protecting vital structures such as the ulnar artery and nerve. The excision itself involves removing the distal 1-2 cm of the ulna, with an emphasis on preserving the ulnar styloid process and the ulnar collateral ligament whenever possible. After the excision, the remaining bone is smoothed and contoured to ensure proper healing and function. Finally, the remnants of the wrist capsule are anchored to the distal ulna, and the incision is meticulously closed in layers to promote optimal recovery.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The excision of the distal ulna, as described by CPT® Code 25240, is indicated for various conditions that may affect the wrist and the distal ulna's functionality. These indications may include:

  • Distal Ulnar Impaction Syndrome - A condition where the distal ulna impacts against the carpal bones, leading to pain and dysfunction.
  • Ulnar Styloid Fractures - Fractures of the ulnar styloid process that may not heal properly and cause ongoing wrist issues.
  • Arthritis of the Distal Radioulnar Joint - Degenerative changes in the joint that can lead to pain and limited range of motion.
  • Instability of the Ulnar Side of the Wrist - Conditions that result in instability, necessitating surgical intervention to restore function.

2. Procedure

The procedure for excising the distal ulna involves several critical steps to ensure effective and safe execution. Each step is designed to facilitate access to the distal ulna while minimizing damage to surrounding structures.

  • Step 1: Incision An incision is made over the posterior aspect of the wrist, which provides the necessary access to the underlying structures. This initial incision is crucial for exposing the dorsal retinaculum.
  • Step 2: Exposure of the Dorsal Retinaculum The dorsal retinaculum is carefully exposed, and transverse incisions are made at both the proximal and distal borders. This step is essential for allowing further access to the extensor tendons and the distal ulna.
  • Step 3: Longitudinal Incision A longitudinal incision is made through the sixth compartment, which contains the extensor carpi ulnaris tendon. This incision allows for the elevation and radial displacement of the retinaculum, facilitating better visualization of the distal ulna.
  • Step 4: Exposure of the Distal Ulna The distal ulna is exposed with careful dissection, ensuring that the ulnar artery and nerve are protected throughout the procedure. This step is critical to prevent complications and ensure the safety of the patient.
  • Step 5: Excision of the Distal Ulna The distal 1-2 cm of the ulna is excised using an osteotome or bone saw. This excision is performed with precision to remove the affected portion while attempting to preserve the ulnar styloid process and the ulnar collateral ligament, if possible.
  • Step 6: Smoothing and Contouring After the excision, the remaining bone is smoothed and contoured to promote proper healing and function of the wrist. This step is vital for ensuring that the wrist can move freely post-surgery.
  • Step 7: Closure The remnants of the wrist capsule are anchored to the distal ulna, and the wrist incision is closed in layers. This layered closure technique is important for optimal healing and minimizing scarring.

3. Post-Procedure

Post-procedure care following the excision of the distal ulna is essential for ensuring proper recovery and minimizing complications. Patients are typically monitored for any signs of infection or complications related to the surgery. Pain management strategies are implemented to address discomfort during the recovery phase. Patients may be advised to limit wrist movement and engage in physical therapy to restore function gradually. Follow-up appointments are crucial to assess healing and determine when normal activities can be resumed. Additionally, any specific instructions regarding wound care and activity restrictions should be provided to the patient to support optimal recovery.

Short Descr PARTIAL REMOVAL OF ULNA
Medium Descr EXCISION DISTAL ULNA PARTIAL/COMPLETE
Long Descr Excision distal ulna partial or complete (eg, Darrach type or matched resection)
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) 0 - Payment restriction for assistants at surgery applies 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) P5B - Ambulatory procedures - musculoskeletal
MUE 1
CCS Clinical Classification 142 - Partial excision bone
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.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
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.
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).
AG Primary physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
F5 Right hand, thumb
F7 Right hand, third digit
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
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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