A system, comprising: an electrode arrangement configured for implantation in an epidural space; a neural modulation generator configured to use electrodes in the electrode arrangement to generate modulation fields; at least one storage to store supra-perception threshold dorsal root modulation field parameter data and therapeutic modulation field parameter data, the therapeutic modulation field parameter data being different than the supra-perception threshold dorsal root modulation field parameter data; and a controller operably connected to the neural modulation generator, the system being configured to: deliver a placement modulation field from the electrode arrangement in the epidural space to the dorsal roots using the supra-perception threshold dorsal root modulation field parameter data; and deliver a therapeutic modulation field from the electrode arrangement placed in the desired position within the epidural space to a therapeutic neural target using the therapeutic modulation field parameter data, wherein the system includes an implantable device and an external device configured to communicate with the implantable device, the external device configured to program the implantable device with the supra-perception threshold dorsal root modulation field parameter data and the therapeutic modulation field parameter data, the system further comprising a remote service with a database accessible through Internet communication, wherein the service is configured to: receive patient data from a plurality of patients, the patient data including dorsal root location of the electrode arrangement and corresponding paresthesia generated for the dorsal root location of the electrode arrangement; perform data analytics on the patient data from the plurality of patients; and co-register patients to identify a likelihood of paresthesia for a supra-perception therapy or a likelihood of analgesia for a sub-perception therapy at a dorsal root location. an electrode arrangement configured for implantation in an epidural space; a neural modulation generator configured to use electrodes in the electrode arrangement to generate modulation fields; at least one storage to store supra-perception threshold dorsal root modulation field parameter data and therapeutic modulation field parameter data, the therapeutic modulation field parameter data being different than the supra-perception threshold dorsal root modulation field parameter data; and a controller operably connected to the neural modulation generator, the system being configured to: deliver a placement modulation field from the electrode arrangement in the epidural space to the dorsal roots using the supra-perception threshold dorsal root modulation field parameter data; and deliver a therapeutic modulation field from the electrode arrangement placed in the desired position within the epidural space to a therapeutic neural target using the therapeutic modulation field parameter data, deliver a placement modulation field from the electrode arrangement in the epidural space to the dorsal roots using the supra-perception threshold dorsal root modulation field parameter data; and deliver a therapeutic modulation field from the electrode arrangement placed in the desired position within the epidural space to a therapeutic neural target using the therapeutic modulation field parameter data, wherein the system includes an implantable device and an external device configured to communicate with the implantable device, the external device configured to program the implantable device with the supra-perception threshold dorsal root modulation field parameter data and the therapeutic modulation field parameter data, the system further comprising a remote service with a database accessible through Internet communication, wherein the service is configured to: receive patient data from a plurality of patients, the patient data including dorsal root location of the electrode arrangement and corresponding paresthesia generated for the dorsal root location of the electrode arrangement; perform data analytics on the patient data from the plurality of patients; and co-register patients to identify a likelihood of paresthesia for a supra-perception therapy or a likelihood of analgesia for a sub-perception therapy at a dorsal root location. receive patient data from a plurality of patients, the patient data including dorsal root location of the electrode arrangement and corresponding paresthesia generated for the dorsal root location of the electrode arrangement; perform data analytics on the patient data from the plurality of patients; and co-register patients to identify a likelihood of paresthesia for a supra-perception therapy or a likelihood of analgesia for a sub-perception therapy at a dorsal root location.