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Official Description

Revision of total knee arthroplasty, with or without allograft; 1 component

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 27486 refers to the revision of a total knee arthroplasty, which is a surgical intervention aimed at correcting issues related to a previously implanted knee prosthesis. This revision may be necessary due to mechanical complications, such as failure of the implant, or other complications including infection. The procedure can involve the revision of either the femoral component, the tibial component, or both, depending on the specific issues encountered. During the surgery, a long incision is made that begins over the femur and extends down over the knee to the tibia, allowing access to the joint. Careful dissection of the surrounding soft tissues is performed to protect vital nerves and blood vessels. The surgeon evaluates the extent of any bone loss and determines if a bone allograft is needed to restore the bone structure. If so, the allograft is obtained from a bone bank and shaped to fit the defect. The procedure may also involve the use of internal devices, such as metallic cages, plates, and screws, to aid in restoring bone length. After the reconstruction, a new prosthesis is implanted, and any contracted knee ligaments may be released to ensure proper function. The procedure concludes with the evaluation of patellofemoral tracking and the closure of soft tissues and skin in layers. This code is specifically used when only one component, either femoral or tibial, is revised, while a different code (CPT® 27487) is designated for cases where both components are revised.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The revision of total knee arthroplasty, as described by CPT® Code 27486, is indicated for several specific conditions that may arise post-surgery. These include:

  • Mechanical Complications The procedure may be necessary due to mechanical failures of the implant, which can include issues such as loosening, instability, or malalignment of the prosthetic components.
  • Infection In cases where an infection develops around the knee joint, revision surgery may be required to remove the infected components and address the underlying issue.
  • Bone Loss Significant bone loss around the knee joint may necessitate the use of bone grafts or other reconstructive techniques to restore the structural integrity of the joint.
  • Patellofemoral Issues Problems related to patellofemoral tracking or degenerative joint disease may also warrant a revision to improve knee function and alleviate pain.

2. Procedure

The procedure for the revision of total knee arthroplasty involves several critical steps, which are detailed as follows:

  • Step 1: Incision and Access A long incision is made starting over the femur, extending down over the knee, and continuing over the tibia. This incision provides the necessary access to the knee joint for the surgical intervention.
  • Step 2: Soft Tissue Dissection The surgeon carefully dissects the soft tissues surrounding the knee joint, taking special care to protect important nerves and blood vessels during this process.
  • Step 3: Component Removal The femoral and/or tibial components of the existing prosthesis are removed. The surgeon assesses the extent of any bone loss that may have occurred during the implant's lifespan.
  • Step 4: Bone Grafting If there is significant bone loss, a bone allograft may be obtained from a bone bank. The allograft is shaped to fit the defect, or cancellous bone may be morcellized and packed into the area of bone loss.
  • Step 5: Internal Device Placement Internal devices such as metallic cages, plates, and screws may be utilized to restore bone length and provide stability to the knee joint.
  • Step 6: Implantation of New Prosthesis Once the bone reconstruction is complete, a new prosthesis is implanted. If the knee ligaments are contracted, they are released to facilitate proper function.
  • Step 7: Trial Components and Evaluation Trial components are placed to evaluate patellofemoral tracking. Adjustments such as lateral release or medial reefing may be performed to ensure optimal tracking.
  • Step 8: Patella Resurfacing If there is significant patellofemoral degenerative joint disease, the patella may be resurfaced with a polyethylene button to improve joint function.
  • Step 9: Securing the Components If an unlinked prosthesis is used, the femoral component is secured using either a press-fit technique or bone cement. The tibial component, which consists of a metal tray and plastic spacing device, is then secured to the proximal tibia using screws or bone cement.
  • Step 10: Finalizing the Procedure If a hinged prosthesis is utilized, the stem is inserted into the femur and secured similarly. The tibial stem is also secured to the proximal tibia. The range of motion is evaluated before the soft tissues and skin are closed in layers.

3. Post-Procedure

Post-procedure care following the revision of total knee arthroplasty involves monitoring the surgical site for signs of infection, managing pain, and ensuring proper rehabilitation. Patients are typically advised on weight-bearing restrictions and may require physical therapy to regain strength and mobility in the knee. Follow-up appointments are essential to assess the healing process and the functionality of the new prosthesis. Any complications that arise during recovery should be addressed promptly to ensure optimal outcomes.

Short Descr REVISE/REPLACE KNEE JOINT
Medium Descr REVJ TOTAL KNEE ARTHRP W/WO ALGRFT 1 COMPONENT
Long Descr Revision of total knee arthroplasty, with or without allograft; 1 component
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) 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.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 152 - Arthroplasty knee
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
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).
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.)
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).
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).
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).
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.
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.
74 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure after administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may terminate a surgical or diagnostic procedure after the administration of anesthesia (local, regional block(s), general) or after the procedure was started (incision made, intubation started, scope inserted, etc). under these circumstances, the procedure started but terminated can be reported by its usual procedure number and the addition of modifier 74. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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.
AG Primary physician
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
ET Emergency services
GJ "opt out" physician or practitioner emergency or urgent service
GW Service not related to the hospice patient's terminal condition
GZ Item or service expected to be denied as not reasonable and necessary
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
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
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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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2010-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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