I have chosen not to disclose my bipolar to my employer. I would get almost no benefit and the risk to my professional status is too great. I do have friends at work that know but that's because they are good friends.

You never HAVE to disclose. If you choose to disclose so you can get a leave of absence to pursue treatment, that would be a benefit to you.

If it was me and I decided to pursue changes at my job to help me with bipolar I would first discuss this with a therapist or pdoc. Come up with potential accommodations then approach the employer.