OB-GYN Associates doctor achieves fellow status Posted at 8:17 am August 24, 2013By John Huotari Leave a Comment OB-GYN Associates, P.C. of Oak Ridge announced this week that Dr. Kathryn Hayes has achieved the status of fellow with ACOG, the American College of Obstetrics and Gynecology. For more information, contact OB-GYN Associates at (865) 483-7415.