anyone had/having surgery at navy medical center san diego balboa hosp.

Hello- I am in the begining phase of the process, just looking into the process. Any information you could share with what you had to do to get approved for surgery, would be great. I am looking into the gastric sleeve. I have an appointment with my civilian doctor on 8-24. Not sure how to get a referal to the naval hospital. I am triwest Prime.