Methods for ultrasonically joining portions of a medical lead are provided. One method includes providing a conductor, a fitting and a coil electrode. The conductor has a distal portion that includes an inner conductive portion and an outer insulative portion. The fitting has a first cavity and a second cavity, the first cavity being sized and configured to receive the distal portion of the conductor and the second cavity being sized and configured to receive a portion of the coil electrode. The conductor is ultrasonically welded within the first opening, providing a mechanical and electrical attachment. The coil electrode is also electrically coupled to the fitting, providing an electrical pathway from the conductor to the coil electrode. Also provided are medical leads including ultrasonic bonds and other methods of ultrasonically joining portions of a medical lead.
