Letter for appeal

Does anyone have a sample of a letter that was used in appealing a denial? I'm not sure what to put in mine. I was denied for not having a bmi of >40 for 5 years. I called the insurance today and was told (again) that if you have a bmi of >35 with comorbidities it would be covered. I have 3 of the 4 comorbidities they listed. I want to appeal their denial, but not sure where to start. Thank you in advance for any and all help!

Who is your Insurance carrier.  I would like to take a look at their medical policy and I would be glad to assist you with a appeal letter if you can PM with your specifics height weight and age and any problems you have with daily living due to obesity

I'm also interested in some help with an appeal.  I just got denied on Friday (October 10).  I had completed a 6-month trial period of trying to lose weight on my own, weighing in at my Primary Care Physician's office on a regular basis during this time.  I lost no weight, and in fact, gained 12 pounds during this 6-month period.  They have now referred me to have ONE CONSULTATION with a bariatric doctor.  My insurance coverage is with Aetna HMO.  I'm really feeling hopeless right now.

I have Aetna HMO.. why did they deny you?  I'm going through the 6 month program but wanted to see what to avoid... please keep me in the loop.