Patient Portal Digestive Health. And Preventative Care. Patient Portal Digestive Health. ... GI Medicine Associates' main office is located on Little Mack near 12 Mile Road in St. Clair Shores, close to major crossroads and the I-94 freeway. ... Saint Clair Shores, MI 48081-3017 Macomb Township Office 17900 23 MIle Road, Suite 404 Macomb ....