I get calls from this number two or three times a day not including other numbers they call from.  It's the old medicare garbage  when you  get  close to 65.  Your information is out there and these idiots have found it.  The best thing to do is not answer.  I have had to turn off my phone for a day to slow down there calls.  This does not include the mail you will get from insurance companies. Be careful is you do answer the mail.  some of them look official but they are not.   So good lluck and ignore them and shred the junk mail.  .