Ah ha!

Just realised that this site is US based.

In the UK there is a lot of legislation around having to declare stuff, so that minority groups, people with disabilities etc are given a fair shot at getting work.
This is sold to us as equality.

I only discovered the other week that in the US the opposite applies - it can be seen as discriminatory to ask.

Now I'm not sure if here you are obligated to mention diabetes, but I used to find work for people with problems. Quite a few people with a severe form of diabetes, used to find it difficult either to find work or to hold onto it when they got it, because of hypo attacks etc.