MN GAMC? anyone?

 I have inquired on the MN forum, and the Duodenal Switch forum, so I thought I would try here too. (Can't hurt, right?)

I live in Duluth MN, and have GAMC (General Assistance Medical Care). It's just a straight Medicaid. I have no HMO. Anyone in here have the same insurance and successfully got the Duodenal Switch?

I know it pays for Lap Band, RNY.. I called the insurance and they told me that Bariatric Surgery IS covered, as long as it's medically necessary. I asked the lady specifically what was covered, and all she said was Bariatric Surgery, so I asked her if Duodenal Switch was covered, and she said she didn't know. (Wow.. the people they hire to work for these companies...) 
I asked her to check, and she wouldn't. I told her I was not going to try to go through all the requirements for surgery, and then be denied because the surgery of my choice was not covered. She told me it should be as long as it's medically necessary. 

It took me a long time to get through to these people, as every time I called, I was told there was a high call volume and I would have to call back later, and it hangs up on me. 

Do you think I have a good chance of getting Duodenal Switch covered?
It's not offered in my area, so I will be traveling to Twin Cities to get it done. 

Thank you for you time