Abstract: Devices, systems, and methods used to dress a catheter device are disclosed. The devices and systems include a catheter dressing system including a body, a closure member, an adhesive plate, and an extension tubing having a catheter connector coupled to a distal end. The catheter dressing system is displaceable over the extension tubing and the extension tubing passes through the closure member. The catheter connector is disposable within a chamber of the body to prevent movement of the catheter connector. The closure member is actuated to form a circumferential seal around the extension tubing to prevent contamination of the catheter connector and to prevent axial movement of the extension tubing. The adhesive plate can be adhered to a patient's skin to form a circumferential seal around a catheter skin puncture site. The method includes sliding the catheter dressing system along the extension tubing.