Revision Letter

Does anyone have a good reference for a revision letter to my insurance company? I'd like to write them a letter along with my dr's but not too sure about the body of it. I have a letter for someone that is having the surgery for the first time. Anything is helpful! Thanks! you can even email me at [email protected] thanks alot

Here is an awesome one: http://www.duodenalswitch.com/forum/showthread.php?t=5822