A needle assembly including a needle having a sharpened end and an opposing end and a needle tip shield for shielding the needle. The needle tip shield includes a needle shield connectable to a base and a needle hub fixedly connected to the opposing end. The needle shield and needle hub displace relative to each other from a first state, in which the sharpened end of the needle is exposed outside the needle shield, to a second state, in which the sharpened end of the needle is shielded by the needle shield. An actuation button is movably connected to the needle hub to maintain the needle shield and needle hub in a releasable locked state in a first button position relative to the needle hub and to permit the needle shield and needle hub to displace relative to each other in a second button position relative to the needle hub.