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Official Description

Arthroscopy, shoulder, surgical; distal claviculectomy including distal articular surface (Mumford procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 29824 refers to a surgical procedure known as arthroscopy of the shoulder, specifically a distal claviculectomy, which is also commonly referred to as the Mumford procedure. This minimally invasive technique is performed to alleviate pain and improve function in patients suffering from shoulder conditions related to the acromioclavicular joint. During the procedure, the patient is typically positioned either in a lateral decubitus position, where the body is lying on its side with the arm suspended, or in a beach chair position, which allows for optimal access to the shoulder joint. The procedure begins with the application of skin traction to the arm to facilitate access to the joint. Incisions are made at the anterior and posterior portals of the shoulder joint, and sterile saline solution is introduced to expand the joint space, providing a clearer view for the surgeon. The initial step involves a diagnostic examination of the glenohumeral joint and the subacromial space using specialized arthroscopic instruments. If necessary, additional portal incisions are created to allow for the introduction of surgical tools to access the surgical site effectively. The procedure includes the resection of the anterior aspect of the acromion, which is performed using a stone-cutting burr to remove approximately 10 mm or one-half to two-thirds of the anterior acromion. This step is crucial for alleviating impingement symptoms. Following this, the distal end of the clavicle is exposed and resected, typically excising about 1-2 cm of the distal clavicle. This excision is essential to eliminate contact between the articular surfaces of the acromion and the clavicle, thereby reducing pain and improving shoulder mobility. Upon completion of the procedure, the instruments are removed, excess fluid is drained from the joint, the incisions are closed, and a dressing is applied to promote healing.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The arthroscopic Mumford procedure (CPT® Code 29824) is indicated for patients experiencing specific shoulder conditions that may benefit from the resection of the distal clavicle and acromion. The following indications are explicitly associated with this procedure:

  • Shoulder Impingement Syndrome - This condition occurs when the rotator cuff tendons are intermittently trapped or compressed during shoulder movements, leading to pain and limited range of motion.
  • Acromioclavicular Joint Arthritis - Degenerative changes in the acromioclavicular joint can cause pain and dysfunction, making surgical intervention necessary to relieve symptoms.
  • Subacromial Bursitis - Inflammation of the subacromial bursa can lead to pain and swelling, often requiring surgical treatment to alleviate discomfort.
  • Rotator Cuff Tears - In cases where rotator cuff tears are associated with impingement or acromioclavicular joint issues, the Mumford procedure may be performed to enhance surgical outcomes.

2. Procedure

The arthroscopic Mumford procedure involves several key steps that are performed with precision to ensure optimal outcomes. The following procedural steps outline the process:

  • Step 1: Patient Positioning - The patient is positioned in either a lateral decubitus position or a beach chair position to provide the surgeon with the best access to the shoulder joint. Skin traction is applied to the arm to facilitate the procedure.
  • Step 2: Portal Incision and Joint Expansion - Anterior and posterior portal incisions are made over the shoulder joint. A sterile saline solution is then pumped into the joint to expand the joint space, allowing for better visualization and access during the procedure.
  • Step 3: Diagnostic Examination - Using arthroscopic instruments, a diagnostic examination of the glenohumeral joint and subacromial space is conducted to assess the condition of the shoulder and identify any abnormalities.
  • Step 4: Additional Portal Incisions - If necessary, additional portal incisions are made to introduce surgical tools and gain access to the surgical site for further intervention.
  • Step 5: Resection of the Anterior Acromion - The anterior aspect of the acromion is resected using a stone-cutting burr, removing approximately 10 mm or one-half to two-thirds of the anterior acromion to alleviate impingement symptoms.
  • Step 6: Smoothing the Acromion - The underside of the acromion is smoothed with an end-cutting shaver to ensure a smooth surface and reduce friction during shoulder movements.
  • Step 7: Resection of the Distal Clavicle - The distal end of the clavicle is exposed and resected using a stone-cutting burr, excising approximately 1-2 cm of the distal clavicle to eliminate contact between the articular surfaces of the acromion and clavicle.
  • Step 8: Closure and Dressing - Once the procedure is complete, the instruments are removed, excess fluid is drained from the joint, the incisions are closed, and a dressing is applied to promote healing.

3. Post-Procedure

After the completion of the arthroscopic Mumford procedure, patients can expect specific post-procedure care and recovery considerations. It is essential to monitor the surgical site for any signs of infection or complications. Patients are typically advised to rest the shoulder and may be instructed to use a sling for support during the initial recovery phase. Physical therapy may be recommended to restore range of motion and strength in the shoulder. The expected recovery time can vary, but many patients begin to notice improvements in pain and function within a few weeks following the procedure. Regular follow-up appointments with the healthcare provider are crucial to assess healing and progress.

Short Descr SHO ARTHRS SRG DSTL CLAVICLC
Medium Descr SURGICAL ARTHROSCOPY SHOULDER DSTL CLAVICULC
Long Descr Arthroscopy, shoulder, surgical; distal claviculectomy including distal articular surface (Mumford procedure)
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) P5B - Ambulatory procedures - musculoskeletal
MUE 1
CCS Clinical Classification 142 - Partial excision bone

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)
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)
LT Left side (used to identify procedures performed on the left side of the body)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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.
SG Ambulatory surgical center (asc) facility service
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
GC This service has been performed in part by a resident under the direction of a teaching physician
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).
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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).
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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).
54 Surgical care only: when 1 physician or other qualified health care professional performs a surgical procedure and another provides preoperative and/or postoperative management, surgical services may be identified by adding modifier 54 to the usual procedure number.
55 Postoperative management only: when 1 physician or other qualified health care professional performed the postoperative management and another performed the surgical procedure, the postoperative component may be identified by adding modifier 55 to the usual procedure number.
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.
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.)
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
KX Requirements specified in the medical policy have been met
PA Surgical or other invasive procedure on wrong body part
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
SA Nurse practitioner rendering service in collaboration with a physician
TR School-based individualized education program (iep) services provided outside the public school district responsible for the student
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
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
Date
Action
Notes
2021-01-01 Changed Short and medium descriptions changed.
2002-01-01 Added First appearance in code book in 2002.
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