A pen needle assembly (701) includes a hub (731) and a metal needle (721) fixedly connected to the hub (731). A cover member (711) removably receives the hub for covering a first end of the needle (721). A sealing member (741) covers a second end of the needle (721). At least one component of the pen needle assembly (701) other than the metal needle (721) is manufactured of a biodegradable polymer, thereby providing a more environmentally friendly pen needle assembly (701) for a drug delivery device (100).
