Can Tricare Be Primary Over Medicare? 
Tricare is never primary over Medicare . It will only pay after all other insurances have paid . If you have Tricare and are entitled to Part A , you must have Part B to continue the Tricare pharmacy benefits . However you do not have to enroll in a Part D prescription plan . If you do choose to enroll in a Part D plan , Tricare will be secondary to that plan as well . 