confirmed this is Christiana Care calling.  They just don't take no for an answer.  I have told them six times now, they have the wrong number.

It's Christiana Care Hospital doing pre-registration.

Caller left a message in which they stated their telephone number and a reference number.  They told me to call back, use the reference number and someone would help me.  They never identified themselves or the company they were calling from.  I did not return the call