It may be just a wrong number (remember those?), but there has been a cluster of calls here where mysterious no-name calls come in but no message. CID displays "Buffalo NY". Also I read that if you are particularly targeted (paranoid?) a spoofer places the call to your number and then trolls here to see if it's being reported. Hey, I wouldn't put it past 'em to do that. My only question other than what's his/her gain is that the lithium has worn off so why won't they get the prescription refilled?

According to Hodges Directory this number belongs to  Sean Erdmann,  Hirschbeck St,  Buffalo New York ,716-824-5263
http://hodges-directory.us/directory.php?q=5bag-716-824-3778-Buffalo-New-York-E-End-Ave