I think United HealthCare is a PPO, no? I think for some reason PPO's approved a little faster. Anyway, I have Blue Cross/Blue Sheild PPO and I got approval in about 2 1/2 weeks. I feel very grateful, as a lot of people have to struggle with the insurance co. I think a lot has to do with the expertise of the office staff that processes your insurance paper work. If the staff is well versed with what each insurance co. requires, it will go very fast. Very fast means 2 to 4 weeks, unfortunately! But don't give up easily! Stay on top of the ins. co. & Dr.'s office, if your BMI is over 40, they should cover you. Good luck and keep us updated!