ADFM (Active Duty Family Member) - TRICARE Glossary | TRICARE.com

*Notice: TRICARE.com is an independent reference site and is not affiliated with the Department of Defense or the official TRICARE program. For official policy and the most current data, visit TRICARE.mil.*

## Definition ADFM stands for **Active Duty Family Member**, which refers to the immediate family members (spouse and children) of a service member currently serving on active duty in the U.S. Armed Forces.

## What it means in practice For TRICARE purposes, being an ADFM is a specific eligibility category that determines your health plan options, enrollment costs, and out-of-pocket expenses. This category includes the lawful spouse and children (including stepchildren and adopted children) of an active duty service member (ADSM). Unlike their sponsors, ADFMs have choices between several TRICARE plans, most notably TRICARE Prime and TRICARE Select.

When a sponsor is on active duty, ADFMs generally enjoy the lowest out-of-pocket costs in the military health system. For example, if an ADFM chooses **TRICARE Prime**, there are no annual enrollment fees and no out-of-pocket costs for covered services provided by a Primary Care Manager (PCM) or with a valid referral. If they choose **TRICARE Select**, they do not pay an enrollment fee, though they are subject to an annual deductible and cost-shares for outpatient visits.

For the 2026 plan year, ADFM costs are grouped by the sponsor’s enlistment date (Group A or Group B). While Select users have small co-pays, Prime users still enjoy $0 copays for network care. Additionally, the Catastrophic Cap—the maximum amount an ADFM family will pay out-of-pocket for covered services in a calendar year—is significantly lower for ADFMs than for retirees. In 2026, this cap remains one of the most important financial protections for military families facing serious medical issues.

## Related terms * **ADSM (Active Duty Service Member):** The military sponsor currently serving on full-time active duty; they are required to enroll in TRICARE Prime. * **Qualifying Life Event (QLE):** A change in a family’s situation, such as marriage, birth, or legal adoption, that allows an ADFM to change their TRICARE plan outside of open season. * **Catastrophic Cap:** The maximum dollar amount an ADFM family must pay out-of-pocket for covered TRICARE services each year. * **TRICARE Young Adult:** A premium-based plan that allows ADFM children to remain covered until age 26 if they do not have access to employer-sponsored insurance. * **DEERS (Defense Enrollment Eligibility Reporting System):** The database where an ADSM must register their family members to make them eligible for TRICARE.

## Sources * TRICARE.mil: Eligibility for Family Members (https://www.tricare.mil/Plans/Eligibility/FamilyMembers) * Defense Health Agency: TRICARE Costs and Fees (https://www.tricare.mil/Costs) * TriWest Healthcare Alliance: West Region Member Portal (https://www.triwest.com)