Back in July 2019 via my my doctors' recommendation I try a tens unit I received a tens unit through the mail from EMSI. It contained a letter from the representative and a document for me to sign to validate I received the device. I received documents from my insurance stating they were billed for the device. I used the device for under 60 days and returned it. The documents from my insurance stated if I had it any longer I would be charged for keeping the device. Yesterday, May 20 2021 I received a bill from EMSI stating I owe them $175.00 rental fee for the first 30 days I had the device. I got the bill two years later due to an incorrect coinsurance billing. I called EMSI stating I had no paperwork stating I would be charged a rental fee for the first 30 days. The representative stated the EMSI representative who gave me the device should have informed me. I told the representative I never met anyone from EMSI. I told her I received it in the mail. She told they don't mail them out. She gave me the impression she thought I was lying on how I received the device. She even had the document handy that I signed when I received the device implying I did a face to face with an EMSI representative which never happened. She then tried to refer me to her manager. The call went to voicemail. I didn't leave a message. I called my insurance to verify the billing codes were correct which they confirmed. They questioned as did I why I'm hearing about it two years later. I got a quizzical tone as to why I'm hearing about it two years later from the doctors office when asking about the codes and the EMSI who was in charge of getting me the device. She didn't have name in their system. In summation I never met an EMSI representative, I received the device through the mail and never received a document that I would be billed a rental fee for the first 30 days until two years later.