Don’t miss critical deadlines that could cost you thousands. The complete guide to Medicare enrollment periods, penalties, and when to enroll — updated for the 2027 plan year.
The next Medicare Annual Election Period (AEP) opens October 15, 2026 and runs through December 7, 2026, with changes taking effect for the 2027 plan year on January 1, 2027. During AEP you can change Medicare Advantage plans, switch between Original Medicare and Medicare Advantage, or add or change Part D drug coverage.
If you’re reading this outside of AEP, you may still qualify for a Special Enrollment Period after a life event (move, loss of coverage, retirement). Call (518) 258-4226 or send us a note to check.
Every important date, deadline, and enrollment period you need to know to avoid penalties and maximize your Medicare benefits.
When: 7-month period around your 65th birthday
Timeline: 3 months before + birthday month + 3 months after
What you can do: Enroll in Parts A, B, D, Medicare Advantage, or Supplement plans
⚠️ Missing this period can result in permanent penalties!
When: January 1 - March 31 annually
Coverage starts: July 1
What you can do: Enroll in Parts A and B if you missed IEP
⚠️ Late enrollment penalties apply - 10% per year delayed
When: January 1 - March 31 annually
Who: Current Medicare Advantage members only
What you can do: Switch plans or return to Original Medicare
When: October 15 - December 7 annually
Coverage starts: January 1
What you can do: Make any Medicare coverage changes
✅ Best time to review and change all your Medicare coverage!
When: Year-round with qualifying events
Examples: Losing employer coverage, moving, qualifying for Medicaid
Time limit: Usually 60 days from qualifying event
Drop your name and the best way to reach you. I'll come back within one business day to help you figure out which window applies to your situation and what action to take. No fee, no obligation.