VA has gradually been revamping their procedures for approval/denial in their M-21. It would probably behoove your to brush up on their new, improved techniques for politely denying your claim. Attached is the latest Chapter 5 list of “How to let the Vet down gently” or “Everything you wanted to know about how to deny but were afraid to ask”.
I downloaded it for you here. I suggest you read and heed, ladies and gentlemen. It gives you a window in to the process and how tilted it is towards fencing you out.