An apparatus for the ultrasound guided refilling of a drug delivery pump includes an ultrasound imaging transducer having a nosepiece and a support device coupled to the nosepiece of the ultrasound imaging transducer. The support device can have two support holes whose centers are positioned along a horizontal axis of the support device. A marker can be placed in each of the two support holes. The vertical axis of the ultrasound imaging transducer coincides with the vertical axis of the support device. When imaging using this apparatus and the port inlet of the pump is visualized using the ultrasound transducer, two primary marks on skin can be created by inserting a marker into the support holes. The apparatus can then be rotated around its vertical axis, and a marker again inserted into the support holes to create two secondary marks. The inlet port of the pump is then marked at the intersection of lines which connects the primary marks and respectively the secondary marks.