My husband is active duty navy and I went through tricare west. I just had my surgery on September 16, and I felt like the process was fairly easy. I asked my PCM for the referral for surgery, and she submitted it. I had to do 6 months of weigh ins with her and had to make sure she documented what I was doing different in my diet and exercise. I almost had the surgery when we were in the south region and they didn't require the 6 month diet. You can go to the tricare page and search for bariatric surgery in the "what's covered" section and it'll tell you all the requirements