Who called from 6783193700

it's a Doctor's Office:
Gary Henschen MD
2550 Northwinds Pkwy #300
Alpharetta, GA 30009-2234

calls this [my] Medical office to verify appts.

received phone call today stating they had a special offer from my insurance company but would not say my insurance name or what they wanted and said she would give year I was born and I could verify  my day and month-I refused to give her any info and she hung up

Unknown caller and no voicemail... I think Spam