An infusion device ( 10) includes one or more of automatic insertion and retraction of an introducer needle (40) and catheter (28), introducer needle safety arid extension set. The device ( 10) can further comprise a top-push button ( 16) activation feature, a side-push button (402) activation feature or a rotary-button (412) activation feature, and one or more of a manual interlock of an outer barrel and base, and a manual interlock for an extension set top and base. Packaging (500) for an integrated and/or removable inserter with activation button protection is also disclosed.
