I have an iPhone so will block them.. they called today and very pushy and say they are called Nation Wide Health.. I asked for their # to verify they are not a scam  (just horrible business practice).  I receive business calls from different places so these types of calls I answer also as I never know if its to do with my business.  Very annoying when I get these people on the line asking if I am looking for health insurance and sounds like a call center in the Philippines or at least overseas I would guess.  Then puts me through to an American agent who gave his name 'Michael D'. the D part is secret as he didn't tell me what the D stands for.  Just ask for Michael D, they will get you through to me.  hahahaha.  If you have an iPhone then block the number but if not.. I would consider changing your number.  I changed mine a while back as I was being flooded by these types of calls and the new # has cut that down a lot.  I think its when we put our numbers on an application online.  Somehow, someway it falls into these peoples hands.  Good luck!  Now if you all wish to speak to Michael D.. I have his # AND his extension # and you could tell him how you feel about the company he works for?  Nation Wide Health 1.800.533.5125-ext:104.