CPT® Code 27105

The procedure described by CPT® Code 27105 involves the transfer of paraspinal muscles to the hip region, which includes the use of a fascial or tendon extension graft. The paraspinal muscles, which are critical for spinal stability and movement, consist of three main groups: the longissimus, iliocostalis, and spinalis muscles. These muscles originate from the spinous processes of the vertebrae and the iliac crest, and they insert at the posteromedial aspect of the ribs. The transfer procedure begins with an incision made in the thoracolumbar fascia, allowing for the elevation of the serratus posterior inferior muscles. This step is crucial as it provides access to the paraspinal muscle that is to be transferred. The selected muscle is then carefully released from its origin and meticulously freed from the surrounding tissues to ensure that it can be moved without damage. Once the hip is adequately exposed, the paraspinal muscle is transferred to the hip area. In cases where additional length is required for proper attachment, a fascial or tendon extension graft is created. This graft serves to bridge the gap between the transferred muscle and the hip, facilitating a secure connection. Finally, the incisions made during the procedure are closed in layers to promote optimal healing and recovery.