Retirees: Start Paying for Tricare Select Now or Lose Coverage in January

The article states: Retirees who received a medical discharge as well as their families.

I am confused. I retired with 20 years but went through the MEB process.

Thanks! My brother is in TRicare select and called me about this $12 a month, and I had no idea what to tell him (I'm Tricare For Life). I've already passed it on to him.