How do I enroll in Medicare?

Apply online at ssa.gov/medicare. Takes about 10 minutes. Apply 3 months before your 65th birthday month.

When should I enroll in Medicare?

Apply 3 months before your 65th birthday month for Day 1 coverage. Your Initial Enrollment Period is 7 months total.

Do I need to enroll in Medicare at 65?

If you have employer coverage from a company with 20+ employees, you may delay without penalty. Otherwise, enroll at 65 to avoid permanent penalties.

How do I enroll in a Medicare Supplement (Medigap) plan?

Contact an independent broker during your 6-month Medigap Open Enrollment Period for guaranteed issue rights. After that window, you may need medical underwriting.

How do I enroll in Medicare Advantage?

Use medicare.gov/plan-compare or work with an independent broker. Verify your doctors are in-network before enrolling.

What is the Medicare enrollment deadline?

Your Initial Enrollment Period is 7 months: 3 months before your birthday month, your birthday month, and 3 months after. Missing it without a qualifying SEP results in permanent penalties.

Can I enroll in Medicare online?

Yes. Apply for Parts A and B at ssa.gov/medicare. Enroll in Medicare Advantage or Part D plans at medicare.gov/plan-compare or through a licensed broker.

Step-by-step 2026 guide

How to Enroll in Medicare

Enrolling in Medicare involves more than one decision. This step-by-step guide walks you through every enrollment action — from applying for Parts A and B to choosing your supplemental coverage — in the right order.

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Your Medicare Enrollment Steps

Step 1 — Apply for Medicare Parts A and B

How: Online at ssa.gov/medicare. Select “Apply for Medicare Only” if not yet taking Social Security. Takes about 10 minutes.

When: Apply 3 months before your 65th birthday month for coverage to start on your birthday.

What you get: Your red, white, and blue Medicare card arrives 2–3 weeks after applying.

Note: If you are already receiving Social Security benefits, you are automatically enrolled in Parts A and B. You will receive your Medicare card automatically.

Step 2 — Understand Your Coverage Options

Path A — Original Medicare + Medigap + Part D: Keep Original Medicare (Parts A and B). Add a Medicare Supplement (Medigap) plan to cover gaps. Add a standalone Part D plan for prescription drugs.

Path B — Medicare Advantage (Part C): Replace Original Medicare with an all-in-one Medicare Advantage plan. Most include Part D drug coverage. May include dental, vision, and hearing benefits.

Step 3 — Make the Medigap vs. Medicare Advantage Decision

This is the most important decision you make at 65. Key factors: your doctors, your medications, your health, your budget, and how much you travel. An independent broker can compare both options for your specific situation.

Step 4 — Enroll in a Medigap Plan (If Choosing That Path)

When: Apply 1–2 months before your Part B effective date. Your Medigap Open Enrollment Period is the 6 months starting when you are both 65+ and enrolled in Part B. During this window, you have guaranteed issue rights — no health questions.

How: Contact an independent broker who represents multiple Medigap carriers. The broker submits the application to the carrier.

Important: Once your Medigap Open Enrollment Period ends, you may need to pass medical underwriting to get Medigap. Apply while you are healthy.

Step 5 — Enroll in Part D (Prescription Drug Coverage)

When: During your Initial Enrollment Period (same 7-month window as Parts A and B).

How: Use medicare.gov/plan-compare with your full medication list to compare plans. Or work with a broker who runs the analysis for you.

Penalty: If you go 63+ days without creditable drug coverage after becoming eligible, you face a permanent Part D late enrollment penalty.

Step 6 — Enroll in Medicare Advantage (If Choosing That Path)

When: During your Initial Enrollment Period.

How: Use medicare.gov/plan-compare or work with a broker. Verify your doctors are in-network before enrolling.

Note: Medicare Advantage plans are available in specific service areas. Not all plans are available in every ZIP code.

Step 7 — Coordinate or Cancel Existing Coverage

If you have employer coverage: Coordinate your Medicare start date with your employer’s HR department. If your employer has 20+ employees, Medicare is secondary — you may be able to delay without penalty.

If you have COBRA or marketplace coverage: Cancel it effective your Medicare start date to avoid paying double premiums.

If you have VA benefits: VA and Medicare work independently. Having Medicare does not affect your VA benefits.

Key Enrollment Deadlines

Period	Window	What You Can Do
Initial Enrollment Period (IEP)	7 months around 65th birthday	Enroll in Parts A, B, C, D, Medigap
Medigap Open Enrollment	6 months starting when 65+ and Part B enrolled	Guaranteed issue Medigap — no health questions
Annual Enrollment Period (AEP)	Oct 15 – Dec 7 each year	Switch Medicare Advantage or Part D plans
Medicare Advantage Open Enrollment	Jan 1 – Mar 31 each year	Switch MA plans or return to Original Medicare
Special Enrollment Periods (SEPs)	Triggered by qualifying events	Enroll or switch outside standard windows

What Happens If You Miss Your Enrollment Window

Part B late penalty

10% per year for each 12-month period you were eligible but did not enroll. Permanent.

Part D late penalty

1% per month for each month without creditable drug coverage. Permanent.

Medigap

After your Open Enrollment Period, you may be denied Medigap or charged higher premiums based on health.

Frequently Asked Questions

Related guides

Get help with your specific enrollment situation

A free 15-minute consultation covers your specific enrollment situation — whether you are turning 65, still working, or navigating a Special Enrollment Period. No pressure, no cost.

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The Medicare Dude is not affiliated with, endorsed by, or connected to the Centers for Medicare & Medicaid Services (CMS), the U.S. Department of Health and Human Services, or any federal or state government agency.