In an effort to help area residents understand upcoming Medicare changes, the Senior World Group of Dothan will host a free Medicare seminar at Troy University Wednesday, July 20. The information session, which is co-sponsored by the Social Security Administration in Dothan , begins at 9:00 a.m. in Sony Hall on the Dothan Campus. To register, or for more information, contact the Troy University Continuing Education Center at 334-983-0005.