Open Enrollment for Part D 2026 Thursday, October 15, 2026 10:00 AM 10:00 Monday, December 7, 2026 11:00 AM 11:00 Hugh F. Miller Insurance Agency, Inc. 801 1st Avenue Rock Falls, IL, 61071 United States (map) Google Calendar ICS Open Enrollment for Part D and Medicare Advantage starts October 15th, 2026. Last day to enroll is December 7th, 2026.