90 Vermont Avenue, Suite 300. Oak Ridge, TN 37830. Office Hours: Monday - Thursday 8:00 a.m. to 4:30 p.m. and Friday 8:00 a.m. to 3:30 p.m. Phone: (865) 481-2541. Fax: (865) 483-8151. Directions to the Oak Ridge Office »» Enter the address you will be driving from and Google Maps will tell you how to get here!.