The purpose of this study is to collect real-world information on effects of a device called the Vercise Deep Brain Stimulation (DBS) system for treatment of patients with Parkinson's disease that is not well-controlled with medications. The data collected will be stored in a clinical registry and is used by researchers to track long-term trends, monitor the effectiveness of treatments, and improve patient care. The Vercise DBS system is approved for use by the U.S. Food and Drug Administration (FDA) and is considered standard-of-care treatment for these patients. DBS systems contain wires that send electrical signals to the brain to help control movement problems. These systems also include extensions that make it easier to connect the wires to a stimulator (the device that delivers the signals). Researchers aim to observe participants’ symptoms for a period of time after the initial implant of the device. Participants will also be asked to complete questionnaires.