The invention is directed to a laterally inserted spinous process plating device and a method for installing the device using a minimally invasive procedure. The device includes a partially threaded bolt as well as a contralateral and ipsilateral fixation plates, a deployment nut, a lag nut and a locking nut. Each fixation plate includes a pair of wing portions that are pivotally connected to one another to facilitate installation. The each of the fixation plates includes anchoring elements.
