They mistakenly received my number and were looking for someone else. I called the number and asked to be removed from their database. The rep was very nice about removing me.
Have been getting two to six calls a week for about five weeks from this number on my cell phone. They usually call twice each evening - about 15 minutes apart - leave no message. I have not called back as I figure that if whatever they are calling about is not important enough to leave a message then it is not important enough for me to return the call.
Their machine do automatic callbacks after 3 months of no contact, but they don't do cold calls. And they only call their absolutely most bald patients.