CPT® Code 27156

An osteotomy of the iliac, acetabular, or innominate bone, in conjunction with a femoral osteotomy, is a surgical procedure aimed at correcting congenital malformations of these bones. Such malformations can lead to significant issues, including leg length discrepancies and hip subluxation or dislocation. The procedure involves a detailed evaluation of the specific malformation affecting the pelvic bones and the femur. During the surgery, the surgeon exposes the affected bones, marking the planned osteotomy sites on the pelvic bone. Cuts are then made to allow for the reconfiguration of the bone shape. The femur is also assessed for any malformations, and similar cuts are made to facilitate shortening, lengthening, or reshaping as necessary. If the femoral head is not properly positioned, it may be reduced, and the pelvic osteotomy is performed around this corrected position. This ensures that the reshaped pelvic bones align correctly with the femoral head. Wedges created from the cut bone are strategically placed at the osteotomy sites to maintain the appropriate angles, and internal fixation devices such as pins, screws, or wires are utilized to secure the bones in their new positions. It is important to note that CPT® Code 27151 should be used for pelvic and femoral osteotomy procedures that do not involve open reduction of the hip, while CPT® Code 27156 is specifically designated for cases where open reduction of the hip is also performed.