"Kelly White" left a different callback number (800-336-0299) for my housemate, about "a personal business matter in your name" -- from what I've read on here, since she's been in the hospital recently, it's probably related to that.
Yes, it is Gragil Associates out of Pembroke MA, but the caller ID says Hanover MA. They are a medical bill collector and have called BEFORE the 30 days expired on your Federally-protected (FCRA) right to dispute the bill.