Turning 65 is a milestone, and it also starts the clock on one of the most important enrollment windows you’ll deal with in retirement. Here’s a simple, step-by-step checklist to make sure you don’t miss anything.
Step 1: Know Your Initial Enrollment Period
Your Initial Enrollment Period (IEP) is a 7-month window: 3 months before your 65th birthday month, your birthday month itself, and 3 months after. Enrolling in the first 3 months typically means your coverage starts the month you turn 65, so earlier is usually better than waiting.
Step 2: Decide If You Need to Enroll Right Away
This is the step people get wrong most often:
- Already collecting Social Security? You’ll likely be auto-enrolled in Part A and Part B, confirm your card arrives and review whether Part B makes sense for you right away.
- Still working with employer coverage from a large employer (20+ employees)? You may be able to delay Part B without a penalty, but confirm this with your HR department in writing, since the rules depend on employer size.
- Retiring or losing employer coverage? You’ll want to enroll in Part B during your IEP or you could face a permanent late-enrollment penalty and a gap in coverage.
Step 3: Choose Your Coverage Path
Once Part A and Part B are sorted, you’ll choose how to fill the gaps Original Medicare leaves open:
- Original Medicare + Medigap + Part D, more predictable costs, no network restrictions, best guaranteed-issue rates during your IEP
- Medicare Advantage, often $0 premium, extra benefits, but network-based
Pro Tip: If you think you might want a Medigap policy eventually, your IEP is the best time to get one, you generally can’t be turned down or charged more for health conditions during this window, which isn’t guaranteed later.
Step 4: Review Your Prescription Drug Coverage
Whether you go with Medicare Advantage (often bundled) or Original Medicare (standalone Part D), make sure your actual medications are covered on the plan’s formulary. Going without creditable drug coverage when you’re eligible can trigger a permanent Part D late-enrollment penalty later.
Step 5: Get Local, Independent Help
There are dozens of Medicare Advantage and Part D plans available in Knox County alone, and picking blind, or from a single company’s sales call, is how people end up overpaying or missing a plan that actually covers their doctors.
Don’t Wait Until the Last Minute
The biggest mistake we see is waiting until the final weeks of the Initial Enrollment Period to start looking. Contact our team for a free Medicare 101 conversation, we’ll walk through your specific situation, in person or by phone, right here in Knoxville, with no pressure and no cost.

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