Dr. Derek Collins, MEd, CADC, CAMS-II, CSTAS Psychology, Counseling 2759 Delk Rd Suite 2425Marietta, GA 30067 (404) 471-3258 Website About Dr. Derek Collins, MEd, CADC, CAMS-II, CSTAS Alt. Address:Diversion Center561 West Pike StreetSuite 206Lawrenceville, Georgia 30046Alt. Phone: (404) 781-7468