Alliance Ob/Gyn is an obstetrics and gynecology practice built on the idea that when you go to see your obstetrician or gynecologist, you want to be seen by your doctor. Not by a physician's assistant, a nurse practitioner or a technician. ... Patient Portal. 3180 North Point Parkway Building 200, Suite 205 Alpharetta, Georgia 30005 (770) 777 ....