Insurance approval.

Hello everyone. My insurance requested that I do 6 months and go see a physic and get blood work and see a nutritionist and also get a endoscopy. We'll I've done it all and on June 18, 2014 I finally reached my 6 months. And the doctor told me there going to submit everything to oxford. My question is if any one has oxford and if they know how long does approval take to get approved.