Example of appeal letters?

Employer is self-insured so I still have a (slim) chance altho my insurace just denied tthe Lap Band surgery. Are there any appeal letter examples or tips here?

if you need help with a appeal letter I can compose one for you just need you to PM me your BMI age, height and weight.   What co morbidities you have and medications you are taking  what is the insurance name and what state is the insurance company and you are in