Rob,
found two site that may help you determine what to do. The second one I will copy and paste the discussion as I had to sign up to see the post.
http://www.healthcentral.com/multiple-s ... 582/90152/https://www.inspire.com/groups/national ... employmentMy last job was as a Human Resources Specialist for 16yrs. I did have an overactive bladder the last 2 years of employment there and while I did t disclose my use of pee pads to my employer or coworkers, I do feel they knew at least some of the aspects of it.
As per employment laws, may not apply to every state, your employer cannot fire you because you didn't disclose a medical condition... As long as it is not interfering directly with your job duties because an employer needs to reasonably accommodate your medical needs... Like if you need an anti glare screen, special keyboard... Etc... By reasonably it means something that is not going to put a financial burden on the company. In fact, even if a medical condition is visible, staff and employer cannot ask about it, mention it, not even ask if you need help because of this condition (ie; wheel chair, cane, etc).
Best thing to do for both the employee/applicant and company is to go through interview and then ask to speak or make appt with either Human Resources or Employee Relations to explain your medical condition or disability. Some of the reasons are for accommodation purposes, and the other reasons are for future purposes like if you were to need to take a medical leave. If medical condition or disability is not disclosed prior to needing a medical leave it becomes a lot of coming and going with paperwork for both employee and company... Also, if the employee was to make a mistake at work and it was because of a medical condition or disability, depending on severity of mistake, it is possible you can avoid losing your job if this was disclosed at time of hire with Human Resources or Employee Relations; for example you were caught sleeping at your desk... could be due to meds or medical condition... this is grounds for termination but disclosing info at time of hire could help you in disputing termination. When medical conditions are disclosed to either one of these departments, the boss and pertinent staff will only be told the necessary info about your medical condition to avoid problems. For example: you have have overactive bladder or incontinence then boss is only told you need to be allowed extra bathroom breaks and extended bathroom breaks. Needed accommodations are always discussed with the employee first to make sure you are ok with them and are they sufficient or necessary... From there the dept you disclosed this info to will explain the accommodation requirements but not the condition or symptoms to your boss. The ADA covers disabilities but not all conditions fall under disability but we still have rights including privacy. Sorry for the length but i hope it helps someone.

I personally went to Employee Relations and took a dr's note explaining details of frequency, duration, etc... My boss was only told (I was cc'd on email sent to him) I needed extended bathroom breaks along with extra bathroom breaks, the number of time and duration was unknown and if any problems with my performance arose due to these accommodations to speak with Employee Relations first before I was addressed.