Has he applied for support? If not, it might help to look into these or similar options.

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=2ahUKEwjgpset0oHgAhVwjoMKHctrD2QQFjAAegQICxAB&url=https%3A%2F%2Ftransplantliving.org%2Ffinancing-a-transplant%2Fprescription-drug-assistance%2F&usg=AOvVaw1crFimkmnzwuEXrSFmI-zo

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=2ahUKEwjgpset0oHgAhVwjoMKHctrD2QQFjADegQICBAB&url=https%3A%2F%2Fwww.kidney.org%2Fpatients%2Fresources_Prescription&usg=AOvVaw1_bFnWQ-leCP0q1wrq0hod

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=2ahUKEwjgpset0oHgAhVwjoMKHctrD2QQFjAEegQIBhAB&url=https%3A%2F%2Fadvocatemymeds.com%2Ftransplant-rejection-medication%2F&usg=AOvVaw1FVkYNBrNXMKoTHNDl56K-

Those were the first few that came up in a simple search. I'd apply for every one I could fine. Happy to support the go-fund me, but probably best to be working toward as many of these as possible. IMO, they are more likely to get him there and protect him best from variables beyond what can be raised here.

Its a horrible spot and a shame its not part of his basic coverage. I know for the company I work with, you can get clinical support for transplants, they consult and make recommendations and might have line of site to even more options.