An intramedullary assembly for intraosseous bone fusion includes a lag screw member and a tapered screw member. The lag screw member includes- a first elongated body where the first elongated body includes a first threaded portion at a first end and a bulbous portion at a second end. The tapered screw member is coupled to the lag screw member and the tapered screw member includes a second elongated body where the second elongated body includes a second threaded portion at a third end and an opening at a fourth end.
