CPT® Code 27486

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.