GEISINGER GOLD More ways to learn about Geisinger Gold Medicare Advantage plans: Call 855-428-5434 (TTY: 711), daily, 8 a.m. to 8 p.m. GEISINGER GOLD More ways to learn about Geisinger Gold Medicare Advantage plans: Call 855-428-5434 (TTY: 711), daily, 8 a.m. to 8 p.m.