A safety pen needle assembly is provided herein which includes a hub; a needle fixed to the hub having a distal end, formed for insertion into a patient, and a proximal end; a shield; a biasing means disposed to urge the shield from a first position to a second position; and, at least one adjustable tab or locking finger on the hub, the tab or finger being adjustable from a first state to a second state. With the tab or finger being in a first state, the tab or finger interferingly engages the shield so as to restrict movement thereof. The tab or finger in the first state retains the shield in its first position with the proximal end of the needle being exposed. With the tab or finger being in the second state, the tab or finger does not interferingly engage with the shield. As such, the shield is permitted to be urged proximally to the second position by the biasing means. In the second position, the shield covers the proximal end of the needle. Advantageously, with the subject invention, a mechanism is provided for shielding a proximal, or non-patient, end of a pen needle, particularly after use.