DON'T let ZYNEX pressure you into paying for their products if your insurance doesn't cover them. My insurancetold me that since zynex ships their products out before getting insurance approval, it falls under Provider Liability Denial and you get to keep it free of charge! Don't let zynex bully you. Keep the device and don't give any credit card info until you find out if your insurance will cover. Tell zynex upfront. Their calls are recorded so mention it clearly on the call several times, tell them to deal with your insurance not you. And that $270 tens unit, they tried to charge my insurance $391.