Is this an identity theft scam?

Today, I received a call from a man claiming to be from TIAA-CREF. He said there were discrepancies in my SSN and then rattled off a SSN. I didn’t respond yes or no but said that I would contact TIAA-CREF directly to resolve any problems. When I contacted them, the TIAA-CREF call center said no employee would ever call me about my SSN. Would it be a good idea to put a fraud notice on my credit report immediately? To make matters more complicated, I am right in the middle of applying for a mortage to purchase a home and I don’t want that process screwed up.

Tagged as: call center, credit report, discrepancies, fraud, mortage, ssn, tiaa cref