Turning 65: Your Complete New-to-Medicare Guide

Turning 65 is one of the few times in life when a handful of decisions can shape your health coverage and costs for years. The good news: once you understand the four parts of Medicare and the one core choice at the center of it all, the rest falls into place. This guide walks you through it in plain English -- what the parts are, the big decision, how to choose, and exactly when to sign up.

Step 1: The four parts of Medicare

Medicare has four parts, and they each do a different job. Medicare Parts A, B, C, and D explained covers this in more depth, but here is the short version:

Part A (hospital): inpatient hospital stays, skilled nursing, hospice. Most people pay no premium for Part A.

Part B (medical): doctor visits, outpatient care, preventive services, durable medical equipment. Part B has a standard monthly premium.

Part C (Medicare Advantage): an all-in-one private plan that bundles Part A and Part B, usually adds Part D drug coverage, and often includes extras like dental and vision.

Part D (drug coverage): prescription drug coverage, either built into a Medicare Advantage plan or bought as a standalone plan alongside Original Medicare.

Step 2: The one core decision

Almost everything about your Medicare comes down to a single fork in the road:

Path A -- Original Medicare + Medigap + Part D. You keep Original Medicare (Parts A and B), add a Medicare Supplement (Medigap) policy to cover most of what Medicare leaves behind, and add a standalone Part D drug plan. You can see any provider nationwide that accepts Medicare, with no networks and very predictable out-of-pocket costs -- in exchange for a higher monthly premium.

Path B -- Medicare Advantage (Part C). A private plan replaces Original Medicare and bundles hospital, medical, and usually drug coverage into one plan, often with a low or $0 premium and extra benefits. In exchange, you generally use the plan network and pay copays as you go, up to a yearly out-of-pocket maximum.

Our full breakdown, Medicare Advantage vs. Medigap: how to choose, compares the two side by side.

Step 3: How to choose

Four questions do most of the work:

1. Your doctors. Want to keep specific doctors or travel often and see providers anywhere? Original Medicare plus Medigap offers the widest access. Happy to use a local network? Medicare Advantage can work well.

2. Your budget style. Prefer a higher fixed monthly premium and very low costs when you need care? That points to Medigap. Prefer a low monthly premium and paying copays only as you use care? That points to Medicare Advantage.

3. Your prescriptions. Make a list of your drugs. Part D and Advantage plans have different formularies, so the right plan depends on your specific medications.

4. Extra benefits. Many Medicare Advantage plans include dental, vision, hearing, and other extras that Original Medicare does not. If those matter to you, factor them in.

If you have both Medicare and Medicaid, or a qualifying chronic condition, you may have additional plan types available -- these are specialized plans worth learning about as part of your education: Dual Special Needs Plans (D-SNP) for people with Medicare and Medicaid, and Chronic Condition Special Needs Plans (C-SNP). Eligibility for these plans is confirmed one-on-one with a licensed agent.

Step 4: When to sign up

Timing matters, because signing up late can mean lifelong penalties. Your Initial Enrollment Period (IEP) is a 7-month window centered on your 65th birthday: the 3 months before your birthday month, your birthday month, and the 3 months after. For all the windows -- IEP, the Annual Enrollment Period, and Special Enrollment Periods -- see when to sign up for Medicare.

If you are still working past 65 with employer coverage, you may be able to delay Part B without penalty; confirm your situation before you decline it.

Step 5: What to do next

Give yourself a simple runway: learn the parts, make your drug list, decide your path, compare the specific plans available where you live, and enroll during your window. Our free checklist keeps all of that in one place, and a licensed advisor can compare your actual local options at no cost.

Frequently asked questions

What is the first thing to do when turning 65?

About three months before the month you turn 65, decide whether you will take Medicare now or delay it (for example if you are still working with employer coverage). If you are already getting Social Security you are usually enrolled in Parts A and B automatically; if not, you sign up through Social Security during your 7-month Initial Enrollment Period.

Should I choose Medicare Advantage or a Medigap plan?

It comes down to how you want to get care. Original Medicare plus a Medigap policy and a Part D drug plan lets you see any provider that accepts Medicare with very predictable costs but a higher monthly premium. Medicare Advantage bundles everything into one private plan, often with a low premium and extra benefits, but usually uses a network. Neither is best for everyone; it depends on your doctors, budget, and health.

Do I need a separate drug plan?

If you choose Original Medicare plus Medigap, yes -- you add a standalone Part D prescription drug plan. Most Medicare Advantage plans already include drug coverage. Going without creditable drug coverage can trigger a lifelong Part D late-enrollment penalty.

When can I sign up without a penalty?

Your Initial Enrollment Period is a 7-month window: the 3 months before your 65th birthday month, your birthday month, and the 3 months after. Enrolling on time helps you avoid Part B and Part D late-enrollment penalties.

Does it cost anything to get help choosing?

Senior Benefit Assistance does not charge beneficiaries for a plan-comparison conversation. Agents and brokers may be compensated by insurers when enrollment occurs. Plan premiums and costs are set by the plan; verify the specific plan and any relationship disclosures before enrolling.