A medical device is provided which comprises an implantable vascular access port including a fluid passage operable to introduce fluid to a host and/or remove fluid from the host, the fluid passage accessible through a fluid passage access opening and at least a portion of the fluid passage defined by a needle configured to penetrate cutaneous tissue of the host; and an implantable vascular access catheter connectable with the vascular access port; wherein the vascular access catheter and the vascular access port are connectable to each other within the vascular access port.