Zynex, Inc. operates business through its subsidiaries. The Company has five subsidiaries: Zynex Medical, Inc. (ZMI), Zynex Neurodiagnostics, Inc. (ZND), Zynex Monitoring Solutions, Inc. (ZMS), Zynex Billing and Consulting, LLC (ZBC) and Zynex Europe (Zynex Europe ApS) (ZEU). ZMI designs, manufactures and markets medical devices that treat chronic and acute pain, as well as activate and exercise muscles for rehabilitative purposes with electrical stimulation. ZND markets electromyography (EMG), electroencephalography (EEG), sleep pattern, auditory and nerve conductivity neurological diagnosis devices to hospitals and clinics. ZMS develops and markets medical devices for non-invasive cardiac monitoring. ZEU is focused on sales and marketing the Company's products within the international marketplace. ZBC provides outsourced billing services for private medical practices, which include collection services, medical coding and general billing consulting.