I was given prior authorization to have my gastric sleeve on January 24th and everything has been going well until today. I got a bill for $1800 and am very upset/confused. I was under the impression that the approval meant full coverage of the procedure. The financing person at my surgeon's office did not mention anything about a copay that substantial. Does anyone have any experience with Tricare standard or tricare select (as it is now called) and getting a giant bill 3 months later with no warning? Any information is appreciated.