They say that they called from Seton Medical Center. Demanded my date of birth which I do not provide over the phone. They asked me to call them back and confirm. Not sure how to verify this phone number.

They just called my daughter and demanded that she pay money and said that she went to the hospital on Dec 31, 2011 which didn't happen. She has never been to the hospital and if so she is under our insurance. They just stressed her out.

Got calls from this number more than once.  It would leave a voicemail that's an automated message saying all of their reps are busy, blah, blah.  Never identifies themselves and even when I called with another phone to see what the hell they are, it's got the same message.

Called them to find out who they are...

The Daughters of Charity Health Systems  - Patient Financial Services

http://www.dochs.org/

I received also a call from this number and they stated they are from Caretuck business services?

I have received calls from this number several times and never answer it. The voicemail starts with the phone number and asking for a return call, but no identification is given. Not going to call of course.