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Doctors don't need your Social Security number
http://money.msn.com/credit-rating/article.aspx?post=b1d48950-0215-475f-8ff2-15b0e6be9e5a
I never give it. Even when they say that they absolutely MUST have my sponser's ss for insurance reasons, I still say no. I tell them to submit whatever they need to submit and if the invoice is rejected by "insurance" then I will talk to them again. It never is.