Your 65th birthday comes with one of the biggest financial decisions of your retirement: how and when to enroll in Medicare. Get it right and you'll have coverage that fits your health and budget for years. Get it wrong and you can face lifelong late-enrollment penalties or months without coverage. Here's the step-by-step checklist we walk every New York client through.
Step 1: Know Your Enrollment Window
Your Initial Enrollment Period (IEP) is a seven-month window built around your 65th birthday: the three months before your birthday month, your birthday month itself, and the three months after. Enrolling in the three months before your birthday month is the safest move — it means your coverage is ready to go the month you turn 65.
Example: If your birthday is in June, your window runs from March 1 through September 30. Enroll in March, April, or May and your Medicare starts June 1.
Step 2: Still Working? Decide Whether to Delay
If you (or your spouse) are still working and covered by an employer group health plan from an employer with 20 or more employees, you can usually delay Part B without penalty. When that employment or coverage ends, you get a Special Enrollment Period to sign up.
- Smaller employers (under 20 employees): Medicare generally becomes primary at 65 — delaying can leave you dangerously underinsured. Talk to someone before deciding.
- COBRA and retiree coverage do not count as active employer coverage. They will not protect you from the Part B late penalty.
- Drug coverage: make sure your employer plan's drug coverage is "creditable" (your plan must tell you each year). If it isn't, you can rack up a Part D penalty without knowing it.
Step 3: Enroll in Parts A and B
If you're already receiving Social Security, you'll be enrolled in Parts A and B automatically. If not, you apply through the Social Security Administration — online at ssa.gov, by phone, or at a local office. Most people pay no premium for Part A; Part B has a monthly premium set each year.
Step 4: Choose Your Coverage Path
Original Medicare alone leaves real gaps — deductibles, 20% coinsurance with no out-of-pocket cap, and no drug coverage. Most New Yorkers choose one of two paths:
- Path A — Original Medicare + Medicare Supplement (Medigap) + a Part D drug plan. Predictable costs and freedom to see any doctor who accepts Medicare, anywhere in the country.
- Path B — a Medicare Advantage plan (Part C). All-in-one coverage from a private insurer, often with a low or $0 premium and extras like dental, vision, and hearing, using a plan network.
Neither is "better" — the right answer depends on your doctors, your prescriptions, your travel habits, and your budget. We compare both paths side by side in Medicare Advantage vs. Medicare Supplement.
Good news for New Yorkers: New York is one of the few states where Medigap plans are community-rated and available year-round with no medical underwriting. That gives you more flexibility than residents of most other states — and it's worth understanding before you choose a path.
Step 5: Avoid the Late Penalties
- Part B: the penalty adds roughly 10% to your premium for every full 12-month period you were eligible but didn't enroll — and it lasts for as long as you have Part B.
- Part D: the penalty accrues about 1% per month without creditable drug coverage, also permanent.
These penalties are entirely avoidable with a little planning — which is exactly why the timeline above matters.
Your Quick Checklist
- Mark your seven-month enrollment window on the calendar.
- If still working, confirm how your employer coverage works with Medicare.
- Enroll in Parts A and B through Social Security (or confirm automatic enrollment).
- List your doctors and prescriptions before comparing plans.
- Choose Medigap + Part D, or Medicare Advantage.
- Review your coverage every year during the fall Annual Enrollment Period.
This article is for general education only and is not plan-specific advice. Rules and amounts are set by CMS and the Social Security Administration and can change each year. For official information visit Medicare.gov or call 1-800-MEDICARE.