CPT® Code 27477

Epiphyseal arrest, as described by CPT® Code 27477, is a surgical procedure aimed at addressing bone length discrepancies, particularly between the tibia and fibula at their proximal ends. The term "epiphyseal" refers to the epiphysis, which is the growth plate located at the ends of long bones. This procedure is typically indicated when there is a significant difference in length between the femurs or between the tibia and fibula, which can lead to functional impairments or cosmetic concerns. During the procedure, a surgical incision is made over the distal aspect of the femur and/or the proximal aspect of the tibia and/or fibula. Careful dissection of the surrounding soft tissues is performed to avoid damaging critical blood vessels and nerves. Once the distal femur and/or proximal tibia and/or fibula are adequately exposed, various devices such as Blount staples, transphyseal screws, or a plate and screw device are strategically placed in the epiphysis. These devices serve to temporarily halt the growth of the bone, thereby allowing for the correction of the length discrepancy. It is important to note that CPT® Code 27475 is used for epiphyseal arrest of the distal femur, while CPT® Code 27479 is applicable when the procedure involves both the distal femur and the proximal tibia and fibula.