Systems and methods provide for the selective prevention of data transfer from a medical device to allow the patient to have privacy when desired. These systems and methods provide medical devices that can be instructed in various ways to stop recording data and/or transmitting data to external devices and systems. These systems and methods also provide external repeater devices that can also be instructed in various ways to stop recording data being received, stop forwarding data that is being or has already been received, and/or to stop soliciting data from the medical device. These systems and methods also provide for a blocking device that may be separate from the medical device and repeater to provide instruction to the medical device and/or repeater to prevent data transfer such as by stopping the recording or transmission of data. Further, the blocking device may be alternatively configured to provide a jamming signal to prevent data transmissions from being successfully communicated between the medical device and the repeater.