if BMI < 40 after medicare precert diet??

hi. im confused about this. i just started my 6 month diet for medicare of michigan. i asked my pcp if i lose weight will i still qualify for surgery? and he said "lets not think like that." although he seemed supportive of the surgery. had me start on vitamins, gave me a list of reading materials and what have you. he is a good dr. but for medicare u have to have a bmi of at least 35 with comorbities or a bmi of 40 or higher. my bmi is 40.9. i havent went for my sleep apnea test so i dont know if i have that yet. other than joint pain and depression i dont have any cobormities. i'm worried if lose 10 pounds in six months i'll drop below 40 and not get approved! i'm using fitday and exercising so i will lose a bit of weight. my dr. is very thorough and i'm going to give him my fitday printouts. i want my RNY surgery desperately. i'm between a rock and a hardplace i think. if i lose weight, my bmi will drop and i wont qualify. if i dont lose weight, medicare might think i'm non compliant and wont comply with the post op way of living.  i dont know what to do. please help. i need some serious answers. thankyou everyone.

okay, so you reworded what i wrote.  if i lose weight. i cant get the surgery because my bmi would drop below 40 and i have no comorbities if i dont lose weight my insurance company will think i'm noncompliant. rock and a hard place.  got that.  next.

hi paul. thankyou. i have an appointment oct. 9th to see if i have sleep apnea. i have to go in monday to get blood drawn to see if i'm diabetic. i'm not sure about the cholesterol, that was probably included, i'll ask when i go. he's a part of the bariatric clinic here in Flint so he is pro-surgery. i'll know more after the test results. hopefully there's something. there Should be. what other tests should i have him do to see about comorbidities? i have knee pain, but how can that be proven or tested?  i'm also bipolar so i dont know if i could relate my depression to my weight in terms of documentation. but they  are related!