When I retired, they told me I had a disability, but I refused it. Over 20 years later, my pocketbook said "don't be stupid", so I looked into, it and it was VERY easy to get examined and get my disability so I qualified for the care I need. That was despite my initial refusal and the passage of time. My only out-of-pocket was a civilian examination to provide the documentation of my current, but service-related, problems.
FYI, the tax free compensation goes up to about 3k per month for just you, more with dependents. That's over and above treatment.
Long story short - the Ft Worth VA is very good, their service is first rate, and the priority on combat veterans is very much appreciated by this old fuck.
I started on the website, but got stuck on question and called the 800 number - the guy went thru the stuff for me and got it filed.
https://explore.va.gov/disability-compensation
Tarrant County also several Veteran Service Officers ready to help you get thru any red tape.
https://www.nacvso.org/directory/directory_5.aspx