Open-label survey of chronic pain patients recruited from Veteran Affairs, orthopedic and pain health systems. This retrospective pilot study is shaped around a noninvasive neuromodulation system over a 2-week treatment timeline.  The magnitude of the patient population (1511 patients) is amongst the largest population sizes ever studied for noninvasive neuromodulation. The study aimed at assessing the efficacy of non-invasive peripheral nerve stimulation using BioWave to treat chronic pain.