Who Is Primary Medicare Or Tricare? 
Medicare standard is primary to Tricare in all cases . Medicare Part D , if you elect it is also primary to Tricare . If you have a Medicare Advantage plan , let both Tricare and your MA know about the other , and they will organize the coordination of benefits . One important thing to remember is that , if you have Medicare Part A and Tricare , in most cases you will also have to be enrolled in Medicare Part B to keep the Tricare coverage . 