Ya I agree that is not something that your clients need to know ~ it will have little to no effect of the level of care or service they receive and if you need time off for appointments you do not need to say WHY just that there are X number of days a year you will be required to close at Y time due to prior obligations that cannot be rescheduled to another time.

Admittedly at the start of your post I was thinking you are wondering to disclose it to a teacher / caregiver in which case I would say YES cause having a child with ADHD myself while we have the same expectations of him as we do of every child there are some special supports that he needs put in place in order to achieve those expectations due to his condition and so forth ... so others who are left to care for him our place need to be 'aware' of that .... just like any food allergies or other medical conditions should be disclosed if they are ones that would affect how the child is 'cared for' by a 3rd party!