These folks troll for medical insurance information, pretending to be "selling" some sort of pain creme.  Waited on hold to give them my information, but to no avail.  They use spoofed numbers and are the lowest of the low.  Really wanted to give them all of my information (have a great alternate identity including medical number, credit card number and a VERY long last name).  Found out that lying to these sorts of folks, is the best way to cut down on the calls.  Is difficult to not laugh at the ridiculous lies they tell, but is fun to practice.