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Official Description

Arthrotomy, acromioclavicular joint or sternoclavicular joint, including biopsy and/or excision of torn cartilage

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 23101 involves an arthrotomy of either the acromioclavicular joint or the sternoclavicular joint. An arthrotomy is a surgical procedure that entails making an incision into a joint capsule to allow for direct access to the joint space. This procedure is typically performed to investigate and address various conditions affecting the joint, such as disease processes, injuries, or structural abnormalities. The acromioclavicular joint is located at the junction of the acromion of the scapula and the clavicle, while the sternoclavicular joint connects the sternum to the clavicle. During the procedure, the surgeon may perform a biopsy to obtain tissue samples for laboratory analysis, which can help in diagnosing specific conditions. Additionally, if torn cartilage is identified during the exploration, it may be excised to alleviate pain and restore joint function. The approach taken during the procedure will depend on which joint is being operated on, and careful closure of the incisions is performed post-operation to promote healing and minimize complications.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 23101 is indicated for various conditions affecting the acromioclavicular or sternoclavicular joints. These indications may include:

  • Joint Pain Persistent pain in the shoulder region that may be due to joint degeneration, injury, or other pathological conditions.
  • Joint Instability Symptoms indicating instability of the acromioclavicular or sternoclavicular joint, which may result from trauma or chronic conditions.
  • Suspected Joint Disease Conditions such as arthritis or other inflammatory diseases that may require direct visualization and assessment of the joint.
  • Cartilage Damage Evidence of torn or damaged cartilage that may necessitate excision to improve joint function and alleviate symptoms.

2. Procedure

The procedure for CPT® Code 23101 involves several key steps to ensure thorough exploration and treatment of the joint. The steps are as follows:

  • Step 1: Joint Exposure The surgeon begins by making an incision over the appropriate joint, either the acromioclavicular or sternoclavicular joint, depending on the clinical indication. The incision is carefully placed to minimize damage to surrounding tissues and facilitate access to the joint capsule.
  • Step 2: Incision of the Joint Capsule Once the joint is accessed, the joint capsule is incised to allow for exploration. This step is crucial as it provides direct access to the joint space where abnormalities can be assessed.
  • Step 3: Joint Exploration The surgeon explores the joint for any signs of disease, injury, or other abnormalities. This exploration may involve visual inspection and palpation of the joint structures to identify any issues that require intervention.
  • Step 4: Tissue Sampling During the exploration, if any suspicious tissue is identified, the surgeon may obtain tissue samples from the joint cavity. These samples are sent for separately reportable laboratory analysis to aid in diagnosis.
  • Step 5: Cartilage Excision If torn cartilage is found during the procedure, it is excised as needed. This step is important for relieving pain and restoring normal joint function.
  • Step 6: Closure After completing the necessary interventions, the surgeon closes the incisions meticulously to promote healing. A dressing is applied to protect the surgical site and support recovery.

3. Post-Procedure

Post-procedure care following an arthrotomy of the acromioclavicular or sternoclavicular joint typically involves monitoring for any signs of complications, such as infection or excessive swelling. Patients may be advised to rest the affected shoulder and limit movement to facilitate healing. Pain management strategies may be implemented, and follow-up appointments are usually scheduled to assess recovery and discuss any further treatment options based on the findings from the procedure. Rehabilitation exercises may also be recommended to restore range of motion and strength in the shoulder joint as healing progresses.

Short Descr SHOULDER JOINT SURGERY
Medium Descr ARTHRT ACROMCLAV/STRNCLAV JT W/BX&/EXC CRTLG
Long Descr Arthrotomy, acromioclavicular joint or sternoclavicular joint, including biopsy and/or excision of torn cartilage
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) 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 159 - Other diagnostic procedures on musculoskeletal system
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.
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).
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.)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
FS Split (or shared) evaluation and management visit
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)
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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