Medical Service Group SCAM trying to get medical info Seattle Washington

Had just left my pain managment doctor who was referring me for a procedure. An hour later I got a call from Medical Service Group that came in with a local 206 area code.  They said they needed to clarify where my pain was, my insurance info, my doctor's name.  I kept on saying that I wasn't comfortable giving my medical info over the phone.   I called my insurance company and the doctors office and neither of them have heard of a Medical Service Group and said they never would have called for that info.