BRENNAN OB/GYN ASSOC is categorized under PHYSICIANS & SURGEONS specializing in OBSTETRICS & GYNECOLOGY and located at 509 Hamacher St. Ste. 203 in or near the Waterloo, IL area. Find additional information including website, e-mail, map, and directions - OriginalYP.com®. Find additional PHYSICIANS & SURGEONS at MedicalYP.com ®.