Fed BCBS

I am scheduled to see a medical doctor next week for weight loss surgery. I realize I must have three months of medical supervision for weight loss but how specific must it be? Also, does anyone know if they have changed the requirements for the sleeve? Last I heard, you had to have a BMI greater than 60.
Thanks

 I had a very easy time getting Blue cross to approve... My bmi was 43 ... don't worry yet!