Dependent Definition | TRICARE Glossary & Eligibility | TRICARE.com

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## Definition A dependent is a person, typically a spouse or child, whom a military sponsor is legally and financially responsible for and who is eligible for TRICARE health benefits.

## What it means in practice In the TRICARE system, "dependents" are family members whose eligibility for healthcare is derived from a "sponsor" (the active duty, retired, or Guard/Reserve member). To receive any TRICARE benefits, a dependent must be registered in the **Defense Enrollment Eligibility Reporting System (DEERS)**. If a dependent is not in DEERS, they do not exist in the eyes of TRICARE and claims will be denied.

The specific benefits and costs for a dependent depend on the sponsor's status and the plan selected (such as TRICARE Prime or TRICARE Select). For example, in **2026**, dependents of Active Duty Service Members (ADSMs) typically pay $0 out-of-pocket for covered services when using TRICARE Prime, whereas dependents of retirees may face annual enrollment fees and cost-shares.

TRICARE rules define dependents more broadly than some civilian plans. While spouses and biological/adopted children are standard, "secondary dependents" can include parents, parents-in-law, or incapacitated adult children, provided they meet specific financial dependency requirements (usually the sponsor providing more than 50% of their support) and are officially recognized by a military Service Project Office.

Coverage for child dependents generally ends at age 21, or age 23 if the child is a full-time student. However, the **TRICARE Young Adult (TYA)** program allows "adult children" to extend coverage up to age 26, provided they are not married and not eligible for their own employer-sponsored insurance. Note that TYA carries significantly higher monthly premiums than standard dependent coverage—rates which are updated annually by the Defense Health Agency.

## Related terms * **Sponsor:** The service member (active duty, retired, or Guard/Reserve) whose status determines the eligibility of their family members. * **DEERS:** The Defense Enrollment Eligibility Reporting System; the mandatory database used to verify TRICARE eligibility. * **TRICARE Young Adult:** An optional, premium-based plan for adult children who have aged out of regular TRICARE coverage but are under age 26. * **Qualifying Life Event (QLE):** A change in a dependent's life, such as birth, marriage, or divorce, that allows for a change in TRICARE enrollment outside of the Open Season. * **Secondary Dependent:** A family member (like a parent or ward) who may be eligible for TRICARE if they meet strict financial support and legal criteria.

## Sources * TRICARE.mil: Eligibility for Family Members [https://www.tricare.mil/Eligibility/WhoIsEligible/FamilyMembers](https://www.tricare.mil/Eligibility/WhoIsEligible/FamilyMembers) * Defense Health Agency: DEERS Information [https://www.tricare.mil/DEERS](https://www.tricare.mil/DEERS) * Humana Military (East Region Contractor): [https://www.humanamilitary.com/](https://www.humanamilitary.com/) * TriWest Healthcare Alliance (West Region Contractor): [https://www.triwest.com/](https://www.triwest.com/)