Do not call these people back!! They say there are with American Billing Service. They will tell you that you have already called them and say they are trying to help you pay a bill. Then when you tell them you have never heard of them they give you some accurate information about you like you name and home address (which they can get online) and tell you that you owe some company money. They will also give you some incorrect information (Information they made up) to try and get you to give them correct information like you SS# and debit or credit card number. Don't believe their lies. Don't call them back they are only trying to steal your information and use it. I know this because I checked by credit report after getting off the phone with them and my report had no record of this account they acted like I had. I would recommend just block their number.
These people have illegally appropriated the trademarked name of a legitimate firm in Orlando which collects money from insurance companies ONLY FOR DOCTORS! The Orlando company has the name American Billing Service, but they have nothing to do with this outfit in Jacksonville. I talked tothe owner and he said their attorneys were in the process of filing a federal trademark violation suit against the owners of the crooked Jacksonville outfit. These people in Jacksonville are not the same people as the Orlando company.