S.W.
As others have said, it would start with a thorough physical examination of your dad. Then he may be able to apply for disability but that process is long and you are not always guaranteed to get it the first time around. My husband finally applied for his as he has been diagnosed with a rare blood disorder which causes isses with working. At the present time he gets regular Social Security until the hearing at which time he will or won't and we will go around again. You have to start somewhere. Oh remember, he may be in denial and want to quit but can't because it is a male ego thing. Good luck to you and your dad. The other S.