Stuman,Since your dialysis time doesn't affect your normal working day, I wouldn't bring it up. It's none of their business what you do with your time away from work. It's illegal to fire you later if they find out you do dialysis in the evenings. Several people where I work know I'm on dialysis. Once in a while someone asks how I'm doing, but it only rarely comes up, and then it's mostly me reminding them that I'm going to disappear for a transplant one of these days and they'll need to have coverage for my job for a month or so. I remind them once in a while so they won't feel blind-sided when I get called in. Otherwise it's a non-issue. I'm able to do my job and I miss less work time than anyone else on my team.