The Department of Defense is quite specific when it comes to designating benefits to eligible family members. The Armed Forces considers a dependent parent or parent-in-law, an unmarried child younger than 21 years old, a widow, widower or spouse as family members. Stepchildren and adopted children are also considered as family members who can receive benefits. Illegitimate children aren’t counted as family members under certain conditions.
A child who is a full-time student and older than 21 but younger than 23 is also considered a family member who can receive coverage. Further information on this can be found by accessing information about TRICARE Young Adult Coverage. Family member benefits may also be available by a former spouse who doesn’t have any private medical insurance and who hasn’t remarried.