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Official Description

Arthrodesis, great toe; interphalangeal joint

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 28755 refers to the surgical technique known as arthrodesis of the great toe, specifically targeting the interphalangeal joint. Arthrodesis is a surgical procedure that involves the fusion of a joint, which is achieved by eliminating the articular cartilage and stabilizing the bones to promote bone growth across the joint space. In this case, the focus is on the interphalangeal joint of the great toe, which is the joint located between the proximal and distal phalanges of the toe. The procedure is performed through an incision made on the lateral side of the great toe, ensuring that surrounding nerves and blood vessels are carefully protected during the operation. The surgical steps include exposing the joint, excising the articular cartilage, and preparing the bone surfaces for fusion. This is accomplished by using an osteotome to scale the articular surfaces, which allows for the exposure of cancellous bone. To achieve stability and promote healing, internal fixation devices such as pins, screws, staples, or small plates are utilized to hold the bones together across the joint. After the fixation is secured, the incision is closed, and a bulky dressing is applied to protect the surgical site. It is important to note that CPT® Code 28755 is specifically designated for the fusion of the interphalangeal joint, while CPT® Code 28750 is used for the fusion of the metatarsophalangeal joint of the great toe.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure of arthrodesis of the great toe interphalangeal joint, as described by CPT® Code 28755, is indicated for various conditions that affect the stability and function of the joint. These indications may include:

  • Severe arthritis - This condition can lead to significant pain and loss of function in the joint, making fusion a viable option for relief.
  • Joint instability - Instability in the interphalangeal joint may necessitate surgical intervention to restore proper alignment and function.
  • Trauma or injury - Fractures or other traumatic injuries to the great toe that compromise the joint may require arthrodesis for stabilization.
  • Deformities - Congenital or acquired deformities affecting the great toe may be addressed through this surgical procedure to improve alignment and function.

2. Procedure

The surgical procedure for arthrodesis of the great toe interphalangeal joint involves several critical steps to ensure successful fusion of the joint. The process begins with the surgeon making an incision over the lateral aspect of the great toe. This careful approach is essential to protect the surrounding nerves and blood vessels during the operation.

  • Step 1: The incision is made, allowing access to the joint. The surgeon meticulously dissects through the soft tissue to expose the interphalangeal joint of the great toe.
  • Step 2: Once the joint is exposed, the articular cartilage is excised. This step is crucial as it removes the surfaces that would otherwise prevent the bones from fusing together.
  • Step 3: The articular surfaces of the metatarsal head and proximal phalanx, or the proximal phalanx and distal phalanx, are then scaled using an osteotome. This technique prepares the bone surfaces by exposing the cancellous bone, which is vital for the fusion process.
  • Step 4: After preparing the bone surfaces, internal fixation is applied. This may involve the use of pins, screws, staples, or a small plate, which are placed through the bones and across the joint to stabilize it during the healing process.
  • Step 5: Finally, the incision is closed, and a bulky dressing is applied to protect the surgical site and support the healing process.

3. Post-Procedure

Post-procedure care following arthrodesis of the great toe interphalangeal joint is essential for optimal recovery. Patients are typically advised to keep the foot elevated to reduce swelling and to follow specific weight-bearing restrictions as determined by the surgeon. A bulky dressing is applied to the surgical site, which may need to be changed periodically. Pain management strategies, including prescribed medications, are also discussed to ensure patient comfort during the recovery phase. Follow-up appointments are necessary to monitor the healing process and to assess the success of the fusion. Rehabilitation exercises may be introduced gradually to restore mobility and strength to the toe once adequate healing has occurred.

Short Descr FUSION OF BIG TOE JOINT
Medium Descr ARTHRODESIS GREAT TOE INTERPHALANGEAL JOINT
Long Descr Arthrodesis, great toe; interphalangeal joint
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 143 - Bunionectomy or repair of toe deformities

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

20705 Add-on Code MPFS Status: Active Code APC N Removal of drug-delivery device(s), intra-articular (List separately in addition to code for primary procedure)
T5 Right foot, great toe
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).
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).
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.
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.
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)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
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
F1 Left hand, second digit
F5 Right hand, thumb
F6 Right hand, second digit
FA Left hand, thumb
GC This service has been performed in part by a resident under the direction of a teaching physician
GZ Item or service expected to be denied as not reasonable and necessary
KX Requirements specified in the medical policy have been met
LT Left side (used to identify procedures performed on the left side of the body)
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
RT Right side (used to identify procedures performed on the right side of the body)
SG Ambulatory surgical center (asc) facility service
T1 Left foot, second digit
T2 Left foot, third digit
T3 Left foot, fourth digit
T4 Left foot, fifth digit
T6 Right foot, second digit
T7 Right foot, third digit
T8 Right foot, fourth digit
T9 Right foot, fifth digit
TA Left foot, great toe
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
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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