Medicare Enrollment Checklist: What to Gather Before You Sign Up

Getting ready to sign up for Medicare? You do not need to have every coverage decision made before you start, but gathering a few details in advance can make the process easier. This Medicare enrollment checklist helps you organize the information you may need to enroll in Parts A and B, compare other coverage options, and ask the right questions about your current insurance.

1. Check Your Enrollment Timing

Before gathering paperwork, find out when you should sign up. For many people, Medicare eligibility begins around age 65. The Initial Enrollment Period generally starts three months before the month you turn 65, includes your birthday month, and ends three months afterward. Different rules may apply if you qualify earlier or have coverage through current employment.

If you are already receiving certain benefits, check whether you will be enrolled automatically rather than assuming you need to submit an application. You can review your situation using Medicare’s sign-up guidance.

2. Gather Your Personal Details

Social Security handles enrollment in Medicare Part A and Part B. Its sign-up guidance says you should be ready to provide:

• Your Social Security number.
• Where you were born, including city, state and country.
• Start and end dates for current group health plans.
• Start and end dates for group health plans you have had after age 65, if applicable.

If you already have Part A and are signing up for Part B only, Social Security also lists a valid email address and your existing Medicare number among the information you may need. Check its current application instructions before you begin.

3. Review Your Current Coverage

Your current insurance may affect when you enroll and how your coverage works. Before making a change, write down the type of coverage you have and ask the organization that provides it how it coordinates with Medicare.

If you or your spouse are still working

Have the employer’s benefits contact information handy. Ask whether the plan is based on current employment, whether you need Part A or Part B when first eligible, and what happens when the employment or group coverage ends. Do not assume all employer plans follow the same rules.

Some people with qualifying employer coverage can delay Part B without a late enrollment penalty and use a Special Enrollment Period later. The timing depends on the circumstances. Medicare also warns that COBRA does not extend the time to sign up for Part B after employment ends. Review Medicare’s working-past-65 guidance before deciding to wait.

If you have other coverage

If you have retiree coverage, Medicaid, Marketplace coverage, VA benefits, TRICARE or another type of insurance, ask how it works with Medicare before changing or canceling anything. In particular, check whether joining a new plan could affect existing retiree or family benefits.

4. List Your Doctors and Medications

Signing up for Parts A and B is one step. Choosing how to receive your coverage is another. A short list of the care you use now will help you compare your options more carefully.

Write down your providers

• Your primary care doctor and any specialists you regularly see.
• Hospitals, clinics or other facilities you prefer.
• Any services you receive regularly and want to ask about.

If you are considering Medicare Advantage, confirm directly with both the plan and the provider that the provider participates in the specific plan you are considering. A provider’s participation can depend on the plan, not just the insurance company’s name.

Write down your prescriptions

• The name of each medication.
• Its dosage and how often you take it.
• Your preferred retail or mail-order pharmacy.

Use your actual medication list when comparing drug coverage. Medicare’s Plan Finder lets you explore health and drug plans available in your ZIP code and compare options using your needs.

5. Decide What You Need to Compare

Once you understand your enrollment timing, consider how you want to receive your Medicare benefits. You do not need to choose based on a single feature, such as a premium or an advertised extra benefit.

If you are considering Medigap, pay special attention to timing. Medicare says the one-time Medigap Open Enrollment Period generally starts the first month you are 65 or older and enrolled in Part B. State rules and other rights may also matter; see Medicare’s Medigap timing guide.

6. Know Where to Sign Up

A common source of confusion is that different organizations handle different parts of the process:

1. Parts A and B: Review eligibility and sign-up options with Social Security.
2. Medicare Advantage and drug plans: Explore your options through Medicare’s Plan Finder.
3. Existing job-based coverage: Talk with your employer’s benefits administrator before changing coverage.

If you need help understanding your particular circumstances, use official Medicare and Social Security resources rather than relying only on a general checklist.

Your Before-You-Sign-Up Checklist

Use this list as a final review. You can print the page or save it for reference.

Frequently Asked Questions

Do I sign up for Medicare through Social Security or Medicare.gov?

Social Security handles sign-up for Medicare Parts A and B. You can use Medicare.gov to explore Medicare Advantage and prescription drug plans.

What information does Social Security ask for?

Social Security lists your Social Security number, place of birth, and dates of current or previous group health plans among the information to have ready. Additional information may be needed for a Part B-only application.

What if I still have insurance through work?

Ask your employer’s benefits administrator how that coverage works with Medicare. Depending on your circumstances, you may be able to delay Part B, but you should confirm the rules before deciding.

Should I gather my medication list before signing up?

Yes, if you plan to compare prescription drug coverage. Include medication names, dosages and preferred pharmacies so you can review plan formularies and pharmacy options.

Can I use this checklist to choose a plan?

It can help you prepare, but it cannot determine which plan is right for you. Confirm current coverage, provider participation and enrollment rules using official information for your situation.

This article is for general informational purposes only and is not medical, insurance, legal or financial advice. Medicare eligibility, enrollment rules, coverage and plan details can change. Verify current requirements with Medicare.gov, Social Security and any insurer or employer involved in your coverage.