Patient Portal Search ; About About GI Associates ... 2510 Lakeland Drive, Suite 150 Flowood MS 39232. Phone Number: 601-326-3516 Toll Free: 844-285-4710 Fax Number: 601-326-6470. ... 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 ....