va rating

hello,

I have several claims that are service connected but 0%. and recently received a tbi rating at 60%. all my other claims have always been 0. now that one is at 60%, is it possible to appeal them or anything to try and increase the rating from at least the 0% they were given? I have service connection for ptsd, depression and about 5 other things from years ago.

just looking for yalls general knowledge. know on the letters i always recieve it has info for appeal process and what not, but i was posting this to see if anyone had a similar thing happen and know if trying to appeal is even worth it. thanks.