Becoming Medicare-Eligible
| Event | Qualifying Life Event? |
|---|---|
|
Becoming Medicare-eligible at age 65 |
No.
Yes.
|
| Becoming Medicare-eligible under age 65 |
Yes.
Note: Your plan options vary depending on your situation. |
What is Medicare?
Medicare is a health insurance program for people:
- Ages 65 and older
- Under age 65 with certain disabilities
- With end-stage renal disease
- With ALS (Lou Gehrig’s disease)
- With mesothelioma
The Centers for Medicare and Medicaid Services manages Medicare. If eligible, you have the option of using Original Medicare or enrolling in a Medicare Advantage Plan.
| Original Medicare (Medicare Part A and Part B) | Medicare Advantage (Medicare Part C) |
|---|---|
|
|
Have Medicare and TRICARE? Check out your plan options.
Using Medicare and TRICARE Together
If you have Medicare Part A, you must also have Medicare Part B to remain eligible for TRICARE, including prescription drug coverage. Your TRICARE coverage options when you’re eligible for Medicare depend on your age.
| Under Age 65 |
TRICARE Prime If you have Medicare Part A due to a disability and you have Medicare Part B, you don’t have to disenroll from TRICARE Prime or the Uniformed Services Family Health Plan. If you’re in Group A, you may have your TRICARE Prime enrollment fee waived. Check with your regional contractor for details. The fee waiver doesn’t apply to Group B. Note: If you have TRICARE Prime, your claims won’t process through the regional contractor.
If you choose not to enroll in TRICARE Prime or USFHP, you’ll automatically be covered by TFL. |
|---|---|
| Ages 65 and Older |
TRICARE For Life When you have Medicare Part A and Part B, you automatically receive coverage through TRICARE For Life. There are no enrollment forms or enrollment fees for TFL.
|
Prescription Drug Coverage
TRICARE For Life includes prescription drug coverage through the TRICARE Pharmacy Program. You must have Medicare Part B, unless:
- You qualify for one of the exceptions listed above.
- You turned 65 before April 1, 2001.
You must have Medicare Part B, unless you qualify for one of the exceptions listed above. You can continue to get prescriptions filled with no break in coverage as long as you have Medicare Part B when you first become eligible for Medicare Part A. If you don’ enroll in Part B, you can only get your prescriptions filled at military pharmacies.
Medicare Part D
The TRICARE pharmacy benefit is considered . This means you don't need Medicare Part D to have prescription coverage.
In some cases, you may benefit from buying a Medicare Part D plan. Here are some things to consider before you enroll in Medicare Part D:
- Drug coverage: Some Medicare Part D plans may cover drugs that TFL doesn't cover. Each Medicare Part D plan has its own formulary. Compare drug coverage across different Medicare Part D plans with TRICARE drug coverage. Beginning July 1, 2026, Medicare Part D covers certain weight loss drugs under the Medicare GLP-1 Bridge Program.
- Costs: Different Medicare Part D plans have different monthly premiums, deductibles, and copayments. Compare costs across Medicare Part D plans and TRICARE Pharmacy Program costs. If you have limited income, you may be eligible for Extra Help, a program that helps people pay Medicare Part D costs.
If you do decide to enroll in a Medicare Part D plan:
- TRICARE will pay second after Medicare.
- You can enroll during your Medicare Initial Enrollment Period or the Medicare Open Enrollment Period each year.
When you become eligible for Medicare Part D:
- You’ll receive a letter in the mail. It will explain how your TRICARE prescription drug plan works with Medicare Part D.
- Keep this letter for your records. You may need it to show that you don’t have to pay extra if you decide to enroll in Medicare Part D.
Has your medical or pharmacy claim been denied? You may still be covered. Learn more about claims.
Note: Beneficiaries who live overseas (excluding U.S. territories) or who are in prison aren’t eligible for Medicare Part D.
How do I enroll in Medicare Part D if I’ve lost my TRICARE coverage?
You can enroll in Medicare Part D during the Medicare Open Enrollment Period.
- The Open Enrollment Period is from Oct. 15 through Dec. 7 each year.
- Your coverage begins Jan. 1 of the following year.
If you want to enroll in Medicare Part D outside of the Open Enrollment Period, you’ll enroll through a Special Enrollment Period. If you choose this option, Medicare might ask you for proof that you had TRICARE coverage. If you need this proof of creditable coverage, submit your request in writing to:
DMDC/DEERS Support Office
400 Gigling Road
Seaside, CA 93955-6771
Fax: 800-336-4416
Your request must include:
- Sponsor’s name and Social Security number
- Name of person for whom the certificate is requested
- Reason for the request
- Name and address to whom and where the certificate should be sent
- Signature of the requester
You can’t request this proof of coverage letter over the phone.
Questions? Call the DMDC/DEERS Support Office at 800-538-9552. You can also visit milConnect for more information.
Note: If you’re eligible for Medicare and you go 63 continuous days or longer without creditable prescription drug coverage, you may have to pay higher premiums for a Medicare drug plan.
Learn more about other QLEs
Are you looking to see what tests, items, or services Medicare covers? Find out what Medicare covers.
Call WPS Government Services at 866-773-0404.
Last Updated 9/29/2026
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