My kids are 3 and 1, when I called Tricare after they were born they told me the baby would be automatically covered for 30 days. Once I received the birth certificate and SSN I would need to have them enrolled in DEERS. DH enrolled both our kids in DEERS when we received the BC's and SSN, he said it was easy and took about 10 min. We did call Tricare for an extension for a our son as it took us 45 days to receive his BC, it was they only time Tricare was a complete pain in the rear.