Location of insertion site for Nexplanon etonogestrel implant

The figure above reflects the manufacturer's recommendations (the author finds the insertion procedure is easier when the arm is extended). We identify an insertion site approximately three fingerbreadths (6 to 8 cm) superior and lateral to the medial epicondyle of the humerus and 3 to 5 cm (1.25 to 2 inches) posterior to the sulcus between the biceps and triceps muscles. The shaded region denoted by the arrow represents the sulcus, which should be avoided during Nexplanon insertion.