For dependents of federal employees, we cover up to age 22 (midnight of their 22nd birthday). The dependent age rule is set by OPM.

For the dependents of retired military personnel, we cover up to age 21. However, if the dependent is in school, they will be covered up to age 23. Under certain circumstances, you may also continue coverage for a disabled child age 22 or older who is incapable of self-support.