Patient Portal Search ; About About GI Associates About GI Alliance ... Flowood, MS 39232 601-355-1234 601-352-4882 ... GI Associates is the largest gastroenterology group in Mississippi and is one of the largest in the southeast. When you have your first GI appointment with one of our doctors, you will notice that the quality of care is ...Doctors‧Contact‧Request an Appointment‧Referring Physician‧Get Ready‧Pediatrics.