I interpreted this question different in my answer than you did so I may have misunderstood the OP. A simple Yes you can be seen on or off base with Tricare would be my answer.
Your answer makes me think the OP was asking about Tricare Prime or Tricare Standard.
Either way, I hope she gets her answer.
BFP #1 11/07/2012 EDD 07/09/2013 M/C 11/22/2012
BFP #2 02/05/2013 EDD 09/19/2013
Arrived via c-section 09/27/2013