Interesting that you say that CID said "Crystal Springs, MD". Other posts, including mine, say the state is "MS" and that is where the 601 area code is located.
Called this morning at 9:00 AM. I was feeling adventurous so I picked up, even though I didn't recognize the number. No one answered when I said "Hello." After a few seconds, an odd squeak. After a few more, the fast beep indicating they had hung up. Thanks to everyone's comments here, they're now blocked.
Hard to understand medicare rep??? Bs. Finally gave phone to supervisor (more bs.) It's the back brace scam. I needed to know which scam for my own amusement and to keep them busy.