This year I am at the age of medicare eligibility. How do I transition? Is there anything I need to do?

How do you transition? Have a Birthday party! Just make sure DEERS knows. Go to Social Security and get it rolling. When you begin or sign up. Make sure Tricare knows so you begin getting your Tricare for Life. T4L acts as a supplement to Medicare. Medicare is first payer and they send the claim to Tricare. You don't do it. The best thing about T4L is they pay the deductibles.