I had a problem because I don't pee and they wanted a drug test. They had to take several hunks of hair from my head. If you are bald I won't tell you where they go!
But, I got the job.... then I got fired later because I'm not a salesman. If you don't want windows and doors then you don't want windows and doors!!
I would also be upfront with them. "I've been on Nocturnal Dialysis for 4 years and I do great... never missed a day of work or even been late". And if you are waiting for a kidney transplant I would tell them that too.
That is none of their business, but I think in the long run they appreciate honesty.