You apply for Medicare and Medicaid through separate systems, but you can start both applications at once

Medicare and Medicaid are run by different federal agencies — Medicare by the Centers for Medicare & Medicaid Services (CMS) and Medicaid by your state — so there is no single form that covers both. However, you do not have to wait for one to be approved before starting the other. Many people who are may be able to access for both programs apply simultaneously to speed up the process. The path depends on your age and whether you are already receiving Social Security.

People who may have access to for both programs are sometimes called "dual may be able to access." This usually means you are 65 or older and have low income, or you are under 65 and receiving Social Security Disability Insurance (SSDI). The application process itself is straightforward, but timing matters — Medicare has automatic enrollment windows, while Medicaid has no waiting period and can start as soon as you are approved.

Key Takeaways

  • If you are 65 or older and receiving Social Security, you are automatically enrolled in Medicare Part A and Part B unless you actively decline.
  • Medicaid applications go through your state agency, not Medicare, and you can start the Medicaid process while your Medicare enrollment is being processed.
  • If you are under 65 and receiving SSDI, you become may be able to access for Medicare automatically after 24 months of receiving benefits.
  • You will need proof of income, citizenship, and Social Security number for both applications, but the forms are separate and submitted to different places.
  • Some states offer programs that help people coordinate Medicare and Medicaid coverage, so contact your state Medicaid office to learn what is available where you live.

How Medicare enrollment works if you are 65 or older

If you are already receiving Social Security when you turn 65, you are automatically enrolled in Medicare Part A (hospital insurance) and Part B (medical insurance) three months before your 65th birthday. You do not need to do anything — Medicare sends you a card in the mail. This automatic enrollment happens whether or not you have applied for Medicaid.

If you are not yet receiving Social Security at 65, you must enroll in Medicare yourself during your Initial Enrollment Period, which runs three months before your 65th birthday through three months after. You can enroll online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office. Missing this window can result in late enrollment penalties that stay with you permanently, so do not skip this step even if you think you might not need Medicare yet.

Once you have Medicare, you can apply for Medicaid at the same time. Your Medicare enrollment does not affect your Medicaid application, and Medicaid will work alongside Medicare to cover costs that Medicare does not pay.

Applying for Medicaid through your state

Medicaid is administered by each state, so the application process and the office you contact depend on where you live. You can find your state Medicaid office by visiting Medicaid.gov and selecting your state, or by calling 1-800-MEDICARE and asking for a referral to your state Medicaid program.

Most states now allow you to start a Medicaid application online through their website. Some states use a centralized portal, while others have separate applications for different programs. You will need to provide your Social Security number, proof of income (such as recent pay stubs, tax returns, or a Social Security award letter), proof of citizenship or immigration status, and proof of residency. If you are applying based on age and low income, you will also need to report your assets.

The state will review your application and notify you of approval or denial by mail. Processing time varies by state but typically takes two to four weeks. Once approved, Medicaid coverage usually begins on the first day of the month in which you applied, though some states backdate coverage to the first day of the month you became may be able to access.

If you are under 65 and receiving SSDI

If you are receiving Social Security Disability Insurance (SSDI), you become may be able to access for Medicare automatically after you have been receiving benefits for 24 months. You do not need to apply — Medicare will enroll you automatically and send you a card. This happens regardless of your age.

While you are waiting for your Medicare may be able to access to begin, you may already be may be able to access for Medicaid. Many states cover people receiving SSDI with income below a certain threshold. Apply for Medicaid through your state Medicaid office at the same time you are receiving your SSDI benefits. Once your 24-month waiting period ends and Medicare begins, you will have both programs running at the same time.

Documents you will need for both applications

Although Medicare and Medicaid are separate applications, you will use similar documents for both. Gather these items before you start:

  • Social Security number (yours and your spouse's, if applicable)
  • Proof of citizenship or immigration status (birth certificate, passport, or naturalization papers)
  • Proof of income (Social Security award letter, pay stubs, tax returns, or a letter from your employer)
  • Proof of residency (utility bill, lease, or mortgage statement)
  • Bank account information (for Medicaid, to verify assets)
  • Information about any other health insurance you currently have

If you are applying based on disability, you will also need documentation of your disability status. If you are already receiving SSDI, this is already on file with Social Security, so you do not need to provide it again.

Coordinating coverage once you have both programs

Once you are approved for both Medicare and Medicaid, the two programs work together to pay your medical bills. Medicare is your primary payer, meaning it pays first. Medicaid then pays some or all of the costs that Medicare does not cover, such as copayments, coinsurance, and deductibles. This coordination is automatic — you do not need to do anything to make it happen.

Some states offer programs specifically designed for people with both Medicare and Medicaid. These programs, sometimes called "dual may be able to access programs" or "Medicare-Medicaid plans," may offer additional benefits or lower out-of-pocket costs. Ask your state Medicaid office whether your state has such a program and whether you are may be able to access to join.

Keep both your Medicare card and your Medicaid card with you when you go to the doctor. Show your Medicare card first, then your Medicaid card. Your provider will bill Medicare first and then submit any remaining balance to Medicaid.

What happens if you are denied Medicaid

If your state denies your Medicaid application, the denial letter will explain the reason and tell you how to request a hearing. Common reasons for denial include income that is slightly above your state's limit or failure to provide required documentation. If you believe the denial is wrong, you have the right to appeal.

Even if you are denied Medicaid, you will still have Medicare if you are 65 or older or have been receiving SSDI for 24 months. Medicare alone will cover hospital and medical services, though you will be responsible for copayments and deductibles. Some states have programs that help people with Medicare but no Medicaid pay these costs — ask your state Medicaid office about programs like may have access to Medicare Beneficiary (QMB) or Specified Low-Income Medicare Beneficiary (SLMB).

Frequently Asked Questions

Can I apply for Medicare and Medicaid on the same day?

Yes. If you are 65 or older and already receiving Social Security, Medicare enrollment happens automatically, and you can start your Medicaid application at the same time through your state office. If you are not yet receiving Social Security, you must enroll in Medicare first during your Initial Enrollment Period, then apply for Medicaid. There is no rule against applying for both simultaneously.

What if I miss the Medicare enrollment deadline?

If you miss your Initial Enrollment Period and do not have a may have access to life event (such as losing other health coverage), you can still enroll during the General Enrollment Period from January 1 to March 31 each year, with coverage starting July 1. However, you will face a permanent late enrollment penalty added to your Part B premium for as long as you have Medicare. Contact Medicare immediately if you think you missed a deadline.

Does having Medicaid affect my Medicare premiums?

No. Your Medicare Part A and Part B premiums are based on your income and work history, not on whether you have Medicaid. However, if your income is very low, Medicaid may pay your Medicare premiums for you as part of its coverage. Ask your state Medicaid office whether you are may be able to access for this benefit.

Will my Medicaid coverage start before my Medicare coverage?

Possibly. Medicaid coverage typically begins on the first day of the month you applied, while Medicare enrollment can take several weeks to process. If you are approved for Medicaid first, it will cover you until Medicare starts. Once both are active, they work together automatically.

What if I move to a different state?

Medicare coverage follows you to any state — your Medicare card works everywhere in the United States. Medicaid does not follow you. You must apply for Medicaid in your new state within 30 days of moving. Contact your new state's Medicaid office to start an application. Your old state's Medicaid coverage will end when you move.