I received an "invoice" from Progressive Health Diagnostics, LLC (which at the bottom reads "This is an attempt to collect a debt, and any information obtained will be used for that purpose." This invoice was for alleged medical testing. I thought it was relevant as I had just had allergy testing performed and it was close to the same amount, but I called the allergy clinic and they said they had not invoiced yet, so it had to be another provider. So I called the company and asked what this was in reference to. They informed me that it was for testing performed in 2016 (about three years ago) from a Dr, whom I had never heard of. They could not give me anything on the doctor other than a "US National ID Provider ID#, and after I told them I was not prepared to pay, they mentioned that it was "negotiable."Noting that there is NO website, NO rating on BBB, and no "Dr. Abaid" in my area of the country, I am assuming this is a mail fraud scam and refuse to pay it. I just wanted to alert others who may have experienced any similar "invoices" from this company.