Medicare Select (Medigap) Senior Supplement (Medigap) Only available to Medicare recipients with a Part B effective date prior to 1-1-2020 Select and Supplement Seminars Only available to Medicare recipients with a Part B effective date prior to 1-1-2020 To learn more about our plans or to schedule a meeting, please call (800) 895-2421. MCSUPP1_MERCYCAREHEALTHPLANS.COM UPDATED: 12-19-20