Lakeside Doctors Gynecology & Obstetrics. 11200 N. Portland Avenue 2nd floor Oklahoma City, Oklahoma 73120. 11101 Hefner Pointe Dr. Suite 204 Oklahoma City, OK 73120. Patient Forms. Insurance Accepted. Phone and Hours: 405.936.1000 or 800.235.4443 Fax: 405.936.1001. M-TH 9 AM - 4:30 PM F 9AM - 2:30 PM. Closed daily for lunch 12 -1 PM.