Ellen DeGeneres has certainly been in the media spotlight of late. All the talk reminds me of something she said a while back. (I can’t remember when or where or what the circumstances were.) Though she wasn’t referring to medical privacy issues when she spoke, I think her reasoning could easily apply to decisions about disclosing a diagnosis.
She proposed that the important thing is not whether you’re in the closet or out of the closet. The important thing is how having a secret or telling a secret impacts the quality of your life. When keeping a secret becomes a burden, then consider how much your load would be lightened if you let go of it. If apprising everyone of your situation would create an unmanageable weight, then keep it to yourself. That makes sense.