A lead anchor includes an anchor body defining an open lead channel and a rotatable locking element shaped as a portion of a ring and defining a central cavity, an entrance slit, and a protruding nodule extending into the central cavity. The anchor body further defines a locking element channel arranged perpendicular to the lead channel to receive the rotatable locking element. In an open position, the entrance slit of the locking element is aligned with the lead channel of the anchor body so that a lead can be loaded into the lead channel and, in a closed position, the entrance slit is not aligned with the lead channel to prevent a lead disposed in the lead channel from disengaging from the lead anchor. In the closed position, the nodule on the locking element engages the lead and resists rotation of the locking element to the open position.
