I wouldn't - unless they ask why you need to leave your post more often. It's none of their business.
When I worked, my moronic supervisor would frequently reprimand me for snacking at my desk even after I explained to him about my blood sugar dropping & needing to eat more often. His reaction was: "If I let you do it, I have to let everyone else do it."
My sister & I are both diabetic. She's still working. I'm retired. I'll describe my sister's job experience:
She was hired as a receptionist at an employment agency. After she had been there for a few weeks, a co-worker saw her giving herself insulin & told her boss. Her boss asked her what type of injection she was giving herself. She said, "Insulin. I'm diabetic." Her boss got mad & asked, "Why didn't you tell me you were diabetic before I hired you?"
She replied, "Because it has nothing to do with my job; I'm not flying a passenger plane or driving a school bus."
Well, she's still working there. The owner wouldn't DARE fire her because she'd have a very costly discrimination lawsuit.
So...why would he have wanted to know she was diabetic? Probably because his insurance carrier told him not to hire people with chronic conditions because their insurance costs & medical coverage premiums are much higher.