It all depends on what region you are in.
Some parts of Tricare has added the lovely "once in a lifetime" WLS clause so no matter who you see, they might deny you.
HOWEVER, you have a medical necessity beyond say a band failure with a revision to VSG or RNY.
Tricare Standard is more liberal with doctor choice, BUT you will have to meet the copay, the out of pocket cap, pay for all the co-pays for the diagnostics etc. I believe for an individual (at least here in the South) region, the individual annual is $1,000 out of pocket, for a family it's $3,000.
Revisions are risky, there really isn't anything you revise to except have your RNY taken down and converted to either a VSG sleeved stomach or DS to maintain the malabsorption.
Tricare is NOT covering either of these procedures. VSG is ONLY covered at military hospitals (and you don't want a non-revision surgeon trying to take down a RNY pouch, there's only a handful of experienced surgeons who can perform the take down, much less convert you to a sleeve), or just have your RNY reversed, BUT again you don't want someone who hasn't performed complete takedowns on RNY operating on you. Your surgeon is telling you he can't do it, I'd trust what he's telling you. RNY revisions are extremely complicated. DS is NOT covered at all.
Band to VSG revision: June 3, 2009
SW 270lbs GW 150lbs CW Losing Pregancy Weight Maintenance goal W 125-130lbs