Veteran needs help!

This is for my dad. I can’t even believe I’m writing this. He’s a veteran with very little social security to live on. He never let us know how bad things were even though he is picking and choosing bills to pay. We just found out he has been trying to live on $400 a month after he pays his mortgage out of his social security.  We’ve rallied to get his utilities turned back on at home as he was not able to pay them. All of this has come up because he recently passed out while driving and was taken to the hospital. He has chronic liver failure. It is also affecting his brain, making him cloudy and sleepy most of the time. We are trying to help as a family, but we just don’t have enough. We were told that his Medicare will only pay 80% of his medical bill, so we are left with 20%. The VA will not cover  any of it because he was not taken to the VA hospital when it happened. He ultimately needs a liver transplant, which I’m not sure will happen because of his age (70).  Please help us help my dad. I hate that after all the hard work and years of service that this is how his life is ending up. Please help him get back on his feet without the worry of huge medical bills.
thank you for any and all help from the bottom of my heart!!!