She told me she was medicaid. asked my name, address, telephone number, date of birth - that's when i said heck no and hung up

This was the third call I've received in a week in which "Invalid Number" displayed on the Caller ID, and that had never happened before.  The other calls were from different numbers.  Is this some new trend with these shady enterprises?

I've asked them to take our name off their list but they just keep calling -

Indian accented Sam Brown from united healthcare had a list of my medical conditions, never had united insurance,anyway  was sure a scam, hung up

Stop calling.