Ask your manager about the work policy in regard to taking time off for a doctor's appointment. Like other people have said, if I have an appointment, at any time of the day, I just tell my manager I have to leave early/come in late, depending on the time of my appointment, and there are no questions asked. The time off is not taken as sick nor do I have to use my annual leave for it. Of course, I do try to book the appointments as early in the morning as possible so as to not miss too much work and the appointments are generally very quick...they don't waste any time with small talk and it is sometimes difficult to say, "Oh yeah Doc, I forgot that I have this problem also." In a way this can be a pain but also it means that I have always been called back at the exact time of my appointment, versus sometime having to wait hours, even though I had an appointment well in advance, when I was in the US.