Apr 01, 2017 · The following patient portals have their own unique logins and are not accessible by using your AveraChart username and password. Oncology & Hematology Patient Portal; Avera Granite Falls Health Center Patient Portal, Granite Falls, MN (prior to 11/1/20) Avera Medical Group Pierre (FollowMyHealth) Patient Portal, Pierre, SD (prior to 4/1/17).