Thanks for all the great advice and information. It’s been over a year so I think I will need to file this as a supplemental claim. I did read that hearing loss has a high threshold to even get compensation. I have a VA Apt next week and will ask for a referral to see the Audiologist again and get an updated hearing test done before I file just to see if my hearing got worsened since the last test. I do also have other secondary claim under tinnitus: migraines, anxiety/depression, insomnia. I believe the anxiety/depression & insomnia has to be evaluated under mental health. I think these would be easier to get vs the hearing loss.