I am retired military and the entire cost of my Hiatal Hernia repair and NF "wrap" was fully covered by a combination of Medicare and Tricare. Mine was done in March 2013 at a military hospital and I know that they are fully reimbursed by the two coverages. I had all the standard tests--endoscope, Barium swallow x-rays, motility, etc. and I was on Nexium for about five years prior to the operation. I also received months of treatment for a lung abscess that was deemed to have been due to the reflux into my lungs.
Best of luck in your treatment and I hope you have as great a result as I did.