Access your Endocrinology Medical Group Of Orange County patient portal. Address . 725 W. LaVeta Ave, Ste. 220, Orange, CA. Office Hours: 7:30am – 4:30pm (Mon-Fri) Office Number (714) 771-5700. Fax: ... To access the patient portal for Endocrinology Medical Group Of Orange County, Inc (EMGOC), please hit the link below. Remember every doctor ....