I was denied with Cigna PPo do I have a chance?

They denied me because i do not haf TWO professionally supervised weight loss programs for a minimum of 26weeks. However I have a year and a half of documentation for Weight Watchers. Should this be enough? I need a sample of a appeal letter. Please Help. Thank you....

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.