Same: Receive call from "officer, IRS" stating that IRS had filed a lawsuit and I could obtain more information by calling 209-690-7166. I reported it to IRS fraud: https://www.treasury.gov/tigta/contact_report_scam.shtml
I received a call on Jan 4, 2016 that I was going to be sued by the IRS. This is a scam. The IRS does not make phone calls like this. I reported the number to the IRS on Jan7, and by that time the phone number was already disconnected.