Lots of other calls from scam numbers in the last few days.  I didn't answer this one, but assume it's related to these others.
Many of the other numbers have been reported on this site as telemarketers for "health care" (which I get through my employer, so I've *never* visited an Obamacare website, and I would *never* enter a phone number of any type at one of these sites).  My assumption is that my number -- however it was obtained -- has been sold to other unrelated scammers/vermin who are trying from numbers within my area code.