A system comprising neuromodulation therapy planning system and a neuromodulation therapy delivery system that is different than the neuromodulation therapy planning system, the neuromodulation therapy planning system comprising: an ultrasound transducer array comprising at least one ultrasound transducer, the array adapted for external application to a portion of a patient's body; and a control unit comprising: an ultrasound control unit coupled to the ultrasound transducer array and configured to control, at a first time, delivery of ultrasound waveforms at multi-site locations for causing neuromodulation of neural tissue in a patient that simulates neuromodulation of the neural tissue that would be caused by electrical stimulation via cathodes and anodes of an implantable electrical stimulation system of the neuromodulation therapy delivery system; a data collection unit to acquire data indicating a response to the neuromodulation, a data analysis unit configured to analyze the acquired data to accumulate correlation data between a response to the neuromodulation and an ultrasound control parameter used to deliver the ultrasound waveforms, and a reporting module configured to report the correlation data to enable identification of at least one therapy parameter; and the neuromodulation therapy delivery system comprising: the implantable electrical stimulation system, wherein the implantable electrical stimulation system is configured to deliver, at a second time that is after the first time, electrical stimulation therapy as the neuromodulation therapy to the patient using the identified at least one therapy parameter. an ultrasound transducer array comprising at least one ultrasound transducer, the array adapted for external application to a portion of a patient's body; and a control unit comprising: an ultrasound control unit coupled to the ultrasound transducer array and configured to control, at a first time, delivery of ultrasound waveforms at multi-site locations for causing neuromodulation of neural tissue in a patient that simulates neuromodulation of the neural tissue that would be caused by electrical stimulation via cathodes and anodes of an implantable electrical stimulation system of the neuromodulation therapy delivery system; a data collection unit to acquire data indicating a response to the neuromodulation, a data analysis unit configured to analyze the acquired data to accumulate correlation data between a response to the neuromodulation and an ultrasound control parameter used to deliver the ultrasound waveforms, and a reporting module configured to report the correlation data to enable identification of at least one therapy parameter; and the neuromodulation therapy delivery system comprising: the implantable electrical stimulation system, wherein the implantable electrical stimulation system is configured to deliver, at a second time that is after the first time, electrical stimulation therapy as the neuromodulation therapy to the patient using the identified at least one therapy parameter. an ultrasound control unit coupled to the ultrasound transducer array and configured to control, at a first time, delivery of ultrasound waveforms at multi-site locations for causing neuromodulation of neural tissue in a patient that simulates neuromodulation of the neural tissue that would be caused by electrical stimulation via cathodes and anodes of an implantable electrical stimulation system of the neuromodulation therapy delivery system; a data collection unit to acquire data indicating a response to the neuromodulation, a data analysis unit configured to analyze the acquired data to accumulate correlation data between a response to the neuromodulation and an ultrasound control parameter used to deliver the ultrasound waveforms, and a reporting module configured to report the correlation data to enable identification of at least one therapy parameter; and the neuromodulation therapy delivery system comprising: the implantable electrical stimulation system, wherein the implantable electrical stimulation system is configured to deliver, at a second time that is after the first time, electrical stimulation therapy as the neuromodulation therapy to the patient using the identified at least one therapy parameter.