Need advice please

Before I knew what I needed to do to file a claim, I filed a “claim” in 2012 for sleep apnea.  It was denied and should have been, I had no diagnosis submitted, no evidence, no nexus letter…

Now though, I just submitted a fully developed claim for sleep apnea secondary to tinnitus.  I included my nexus letter/IMO letter, official diagnosis and sleep study. 

I got a letter in the mail today from VA, advising that I need to file a different form to ask for a review because I was originally denied for sleep apnea back in 2012 and have new evidence to submit.

 

Does it matter that this claim is as a secondary to a disabled condition, and not directly service connected as the original claim was?