Is Medicare Or Tricare Primary? 
When you reach 65 you must enroll in Medicare parts A & B. Medicare becomes primary and Tri-Care becomes secondary . That is almost seamless as far as the member is concerned . The claim is handled by the provider , sent to Medicare which pays its portion . If there is still an amount owed it is sent to Tri-Care that takes care of its share . If there is still something that is n't covered it is sent to the member . 