Called my house several times, never leaves a message.

Same here.  No one there when I answer.  Never leave voice mail.

Supposely Kidney Foundation looking for donations.

We also got a call from this number Today (August 30, 2009 at 8:23PM). She said, her name was Sarah and wanted to speak to my wife.... I asked what the call was about. She insisted to speak to my wife but I kept asking the reason. Then she said, she is not going to speak to me and hung up the phone.

Same experience as Dave [above], only my call was on 9/15/2009 and once before but I don't remember the date.  I saw on another website that an individual called her phone company [Verizon] and it blocked this number.  I'm going to call my provider and see if that works.