A system, comprising: a leadless pacemaker (702, 102a, 102b) configured to be implanted within a patient, the LP (702, 102a, 102b) including electrodes (108a, 108b) configured to sense cardiac electrical activity, deliver pacing pulses, and perform conductive communication; a second implantable device configured to be implanted within the patient, the SID including electrodes configured to perform conductive communication with the LP, and also including an antenna that enables the SID to communicate with one or more non-implanted devices; a local non-implantable device (LNID) configured to communicate with the SID using RF communication when the LNID is in close proximity to the SID, the LNID including an antenna that enables the LNID to send RF communication signals to, and receive RF communication signals from, the SID; and a remote non-implantable device (RNID) configured to communicate with the LNID over one or more communication networks; wherein the LP (702, 102a, 102b) is not configured to perform RF communication; wherein the RNID is configured to send one or more commands, that are intended for the LP (702, 102a, 102b), by transmitting the one or more commands to the LNID; wherein the LNID is configured to receive the one or more commands from the RNID and send the one or more commands as RF communication signals to the SID using the antenna of the LNID; wherein the SID is configured to receive the one or more commands from the LNID, operate as a communication gateway between the LNID and the LP (702, 102a, 102b) by converting the RF communication signals received from the LNID to conductive communication signals, and send the one or more commands as the conductive communication signals to the LP (702, 102a, 102b) using the electrodes of the SID; wherein the LP (702, 102a, 102b) is configured to receive the one or more commands from the SID, which said one or more commands originated from the RNID, as conductive communication signals that are received using the electrodes (108a, 108b) of the LP (702, 102a, 102b); and wherein the one or more commands that originated from the RNID are optionally translated and/or reformatted by at least one of the LNID or the SID before the one or more commands are received by the LP (702, 102a, 102b). a leadless pacemaker (702, 102a, 102b) configured to be implanted within a patient, the LP (702, 102a, 102b) including electrodes (108a, 108b) configured to sense cardiac electrical activity, deliver pacing pulses, and perform conductive communication; a second implantable device configured to be implanted within the patient, the SID including electrodes configured to perform conductive communication with the LP, and also including an antenna that enables the SID to communicate with one or more non-implanted devices; a local non-implantable device (LNID) configured to communicate with the SID using RF communication when the LNID is in close proximity to the SID, the LNID including an antenna that enables the LNID to send RF communication signals to, and receive RF communication signals from, the SID; and a remote non-implantable device (RNID) configured to communicate with the LNID over one or more communication networks; wherein the LP (702, 102a, 102b) is not configured to perform RF communication; wherein the RNID is configured to send one or more commands, that are intended for the LP (702, 102a, 102b), by transmitting the one or more commands to the LNID; wherein the LNID is configured to receive the one or more commands from the RNID and send the one or more commands as RF communication signals to the SID using the antenna of the LNID; wherein the SID is configured to receive the one or more commands from the LNID, operate as a communication gateway between the LNID and the LP (702, 102a, 102b) by converting the RF communication signals received from the LNID to conductive communication signals, and send the one or more commands as the conductive communication signals to the LP (702, 102a, 102b) using the electrodes of the SID; wherein the LP (702, 102a, 102b) is configured to receive the one or more commands from the SID, which said one or more commands originated from the RNID, as conductive communication signals that are received using the electrodes (108a, 108b) of the LP (702, 102a, 102b); and wherein the one or more commands that originated from the RNID are optionally translated and/or reformatted by at least one of the LNID or the SID before the one or more commands are received by the LP (702, 102a, 102b).