I was not able to get coverage by my insurance for the surgery, so can't help you there...BUT, I can tell you about my pre-op diet...
It is usually done for 2 weeks, but they squeezed me in on a cancellation and allowed me to do 1 week of the pre-op diet.
Pre-op diet:
Meal 1: Any 2 choices: yogurt, fruit, egg, wholegrain Cereal, toast, bagel, waffle, muffin
Meal 2: 1 serving of Protein drink ( I used Atkins Advantage - I think the milk chocolate tastes good and it's not too expensive $ 5- $ 6 for a 4-pack.)
Meal 3: 1 serving (4-6) oz. of lean meat or fish AND a green vegetable (lettuce, peas, green Beans, spinach, salad)
Meal 4: 1 serving of Protein Drink
Also, I had to start a Multivitamin and a Calcium 1000mg supplement with added Vitamin D - Both CHEWABLE.
I could also supplement sugar free Jello, sugar free popsicles, crystal light (all flavors), or Water.
<3 Hope this helps!!