Low BMI with BCBS MN (claims response)

 So after I was told by my bariatric clinic that I would not qualify for surgery as my BMI was not quite 35 (was 34) and my co-morbidity of degenerative joint disease was also not diagnosed a minimum of two years ago, I called my INS. After talking with TWO different reps the nurse sd she would forward the matter to a claims rep. 
Got the call back today and they said case by case basis. NOT NO or MIN two years.
Just thought I would throw that out there.