Medicare Open Enrollment 2025: The Deadlines You Cannot Miss
Medicare open enrollment dates, deadlines, and what changes you can make — everything Americans over 65 need to know for 2025.
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Missing Medicare enrollment deadlines can cost you thousands in penalties — and the windows are narrow. Here’s every deadline you need to know for 2025.
Key Medicare Enrollment Periods
- Initial Enrollment Period (IEP): 7 months centered on your 65th birthday month. Miss this without creditable coverage and pay a permanent penalty.
- Annual Enrollment Period (AEP): October 15 – December 7 each year. Change Part D or Medicare Advantage plans.
- Medicare Advantage Open Enrollment: January 1 – March 31. Switch MA plans or return to Original Medicare once.
- Special Enrollment Periods (SEP): Triggered by life events — losing employer coverage, moving, etc.
2025 Medicare Costs
Part A (Hospital): $0 premium if you paid Medicare taxes 10+ years. Part B (Medical): $185/month standard premium in 2025. Part D (Drugs): Varies by plan; $2,000 out-of-pocket maximum now in effect (Inflation Reduction Act).