TRICARE is the Department of Defense’s health care program for the military community, and it covers active-duty service members, National Guard and Reserve members, military retirees, their families, certain former spouses, survivors, and unmarried adult children up to age 26. If you want to know what TRICARE insurance is and who it covers, the short version is that it’s a federal benefit tied to a sponsor’s uniformed service, not a policy you buy on the open market, and your eligibility flows from your relationship to that sponsor.
What TRICARE Is
TRICARE is authorized under Chapter 55 of Title 10 of the United States Code, which puts the Secretary of Defense in charge of the program and its benefits.1Office of the Law Revision Counsel. 10 USC 1073 – Administration of This Chapter Congress sets the structure, benefits, and funding, typically through the annual National Defense Authorization Act. The Defense Health Agency runs day-to-day operations.
Because it’s a federal program, TRICARE isn’t governed by state insurance rules. Under 10 U.S.C. ยง 1103, state insurance mandates, network regulations, and coverage requirements that apply to commercial insurers don’t apply to TRICARE contracts.2Medicaid.gov. Is TRICARE Subject to the Minimum 3-Year Timely Filing Your benefits look the same whether you live in Texas or Maine. Most of the program is funded through the federal budget; beneficiaries chip in through premiums, deductibles, and copays, but taxpayer dollars carry the bulk of the cost.
TRICARE also qualifies as minimum essential coverage under the Affordable Care Act, so if you’re enrolled you meet the federal health coverage requirement without needing a marketplace plan.3TRICARE. TRICARE and the Affordable Care Act ACA features like marketplace subsidies don’t apply, though, and changes to TRICARE benefits require congressional action rather than insurer discretion.
Who TRICARE Covers
Eligibility runs through your sponsor’s uniformed service, and it’s verified through the Defense Enrollment Eligibility Reporting System (DEERS).4TRICARE. Eligibility If you or a family member isn’t correctly listed in DEERS, TRICARE won’t recognize the coverage, so keeping that record current is the practical starting point for every category below.
Active-Duty Service Members and Their Families
Active-duty service members are automatically enrolled in TRICARE Prime and pay nothing out of pocket for covered care. Their spouses and children are eligible too, but family members choose a specific plan based on where they live and how they want to access care.
National Guard and Reserve Members
Guard and Reserve members activated for more than 30 consecutive days get the same benefits as active-duty members while they’re activated, and their families gain access to the full range of TRICARE plans during that period.5TRICARE. When Activated
When they’re not on active duty, Guard and Reserve members can buy into TRICARE Reserve Select, a premium-based plan similar to TRICARE Select.6TRICARE Newsroom. Learn Your 2026 TRICARE Health Plan Costs
Retirees and Their Families
Retired service members and their dependents keep TRICARE eligibility, but they move to plans with enrollment fees and higher cost-sharing than active-duty families face. Retired Guard and Reserve members who aren’t yet 60 (and so aren’t drawing retired pay) can purchase TRICARE Retired Reserve, which mirrors Select benefits at a higher premium.6TRICARE Newsroom. Learn Your 2026 TRICARE Health Plan Costs
Once a retiree or eligible family member turns 65 and qualifies for Medicare, they must enroll in Medicare Part A and Part B to stay TRICARE-eligible.7TRICARE. Becoming Medicare-Eligible Coverage automatically converts to TRICARE For Life, which pays as a supplement behind Medicare. Sign up for Part B no later than two months before turning 65 to avoid a gap.8TRICARE. I’m Turning 65 Soon, How Do I Enroll in TRICARE For Life?
Former Spouses
Certain former spouses keep full TRICARE benefits after divorce under what’s known as the 20/20/20 rule. The marriage must have lasted at least 20 years, the service member must have at least 20 years of creditable service, and those periods must overlap by at least 20 years. Former spouses who meet all three receive the same benefits as a retired family member. Eligibility ends if the former spouse remarries or enrolls in an employer-sponsored health plan.9TRICARE Newsroom. I’m Getting Divorced – What Happens to My TRICARE Benefit?
Survivors
When an active-duty service member dies, surviving spouses and children remain covered as transitional survivors for three years, with the same plan options and costs as active-duty family members.10TRICARE. Survivors of Active Duty Service Members After those three years, children keep coverage as active-duty family members until they age out, but the surviving spouse’s status shifts to that of a retired family member, which changes plan options and raises out-of-pocket costs.
Adult Children Ages 21 to 26
TRICARE Young Adult covers unmarried children between 21 and 26 who have aged out of regular TRICARE eligibility. To qualify, the young adult must not be eligible for an employer-sponsored plan through their own job and must not qualify for any other TRICARE plan.11TRICARE. Who Qualifies for TRICARE Young Adult? TYA comes in a Prime and a Select version, and the premium is entirely the enrollee’s responsibility.12TRICARE. How Much Does TRICARE Young Adult Cost?
The Plans You Can Choose From
TRICARE isn’t one plan but a family of them. Which ones are open to you depends on your eligibility category and, in some cases, where you live.
TRICARE Prime works like an HMO. You’re assigned a primary care manager who coordinates your care and refers you to specialists. Seeing a specialist without a referral triggers the point-of-service option, which carries much higher costs.13TRICARE. Referrals and Pre-Authorizations Active-duty members are enrolled automatically at no cost; retirees pay an annual enrollment fee.
TRICARE Select behaves more like a PPO. You can see any TRICARE-authorized provider without a referral, in exchange for higher cost-sharing.13TRICARE. Referrals and Pre-Authorizations Select has an annual deductible and per-visit copays that vary by beneficiary group.
TRICARE Prime Remote extends Prime-style coverage to active-duty members and their families stationed more than 50 miles from a military treatment facility, using civilian network providers at the same low cost-sharing.
TRICARE For Life covers Medicare-eligible beneficiaries who carry both Medicare Part A and Part B. There’s no enrollment fee. Medicare pays first, and TFL picks up most of what Medicare leaves behind on services covered by both.7TRICARE. Becoming Medicare-Eligible
TRICARE Reserve Select, TRICARE Retired Reserve, and TRICARE Young Adult are the premium-based options described in the eligibility sections above.
Costs across every plan also depend on beneficiary group. If your sponsor first enlisted or was appointed before January 1, 2018, you’re in Group A. On or after that date, you’re in Group B. Group B generally pays more in enrollment fees and out-of-pocket costs.14TRICARE. Beneficiary Groups
How TRICARE Works Alongside Other Coverage
If you have other health insurance in addition to TRICARE, TRICARE almost always pays last. By law, your other insurer processes the claim first, and TRICARE covers what’s left of the allowable charges.15TRICARE. Using Other Health Insurance The exceptions are Medicaid, TRICARE supplement policies, state crime-victim compensation programs, and a few other federal programs like the Indian Health Service.
For Medicare-eligible beneficiaries, TRICARE pays after both Medicare and any other private insurance. If you lose your other private coverage, TRICARE moves up to primary payer, unless you’re on TRICARE For Life, in which case it stays secondary to Medicare.15TRICARE. Using Other Health Insurance
One boundary worth flagging: TRICARE’s health plans don’t include routine dental or vision care. Active-duty members receive dental care through military dental clinics and the Active Duty Dental Program for referrals to civilian dentists.16TRICARE. TRICARE Active Duty Dental Program Brochure Family members, retirees, and survivors get dental and vision coverage through the Federal Employees Dental and Vision Insurance Program (FEDVIP), which is voluntary and enrollee-pay-all.17BENEFEDS. BENEFEDS Welcomes Members of the Uniformed Services
When You Can Enroll or Switch Plans
TRICARE holds an annual open season each fall, generally running from mid-November through mid-December, with changes taking effect January 1. Miss open season and you’ll usually stay in your current plan for the year.
Outside open season, you can change plans within 90 days of a qualifying life event. Qualifying events include retiring, separating from active duty, marriage, divorce, having a child, moving, becoming Medicare-eligible, and losing or gaining other health insurance.18TRICARE. Qualifying Life Events A qualifying event for one family member opens the 90-day window for everyone in the family.
Service members separating from the military lose TRICARE eligibility, but they can bridge the gap with the Continued Health Care Benefit Program. The application window for CHCBP is 60 days from the date TRICARE eligibility ends. Miss that deadline and the option is gone.