I recently debated this question and decided not to include my dx as part of my essay. During the panel interview, I did mention that I was at a fork in my life which gave me an opportunity to pause for reflection and make a change in careers. When asked about this fork, I briefly explained that "lived experiences" was part of it. I was applying for Rehabilitation Counseling, so by using that phrase I think it was understood that it sorrounded a mental health issue.
I decided that it was best to leave my body of experience, school, and work hold up on its own merits for better or worse.
By the way I start classes in January