An external infusion device for delivering insulin from a reservoir into a body of a user includes the capability to deliver time-shifted basal insulin. The external infusion device includes at least one drive mechanism operatively couplable to the reservoir to deliver insulin into the body of the user, at least one processor to control the external infusion device, at least one power supply, at least one display device operatively coupled to the processor to provide visual information to the user, at least one input device operatively coupled to the processor to allow the user to command the processor, and a housing. Time-shifting of basal insulin occurs when a portion of basal insulin is added to a bolus, to a current basal rate, or to a bolus and a current basal rate.
