Free Medicare Plans Seminars Call 1-800-856-1900 Individuals who are turning 65 or shopping for Medicare coverage can attend a free Excellus BlueCross BlueShield seminar to learn more about their health insurance options. To register for a Medicare Plans Seminar, go to ExcellusMedicare.com/Events or call toll-free 1-800-856-1900. (TTY/TDD users call 1-800-421-1220.)