Insurance Empire Blue Cross Blue Shield

I have Empire too and don't require a diet. I have learned through this site though that it depends upon what your employer elects to do when they decide to offer BC/BS. My plan with my employer does not require it. I have documented all attempts at weight loss going back 10 years though to submit with my doctors paperwork.
Empire also has the medical policy available and their is a form that the doctor has to fill out to submit. Check under the providers tab at Empire and look for Surgery for obesity.
Based on the verbiage that you provided, your plan will require a six-month medically supervised weight-management plan as one of the planks to be qualified for bariatric surgery.
Also, just as the previous poster stated, even though you and someone else might be covered under what seemingly is the same plan, employers can choose different riders (i.e. levels of benefits), so you don't want to rely on the plan's name. The best bet is to check your plan's Web site for more information. You can also contact Blue Cross/Blue Shield's customer service department for more information. To ensure that you get the right information, you will want to contact them a few times to compare the information that you receive from each of them.
My best wishes to you in your goal to achieve better health through weight-loss surgery.