Chase Young had a neck procedure on 3/21 & will be ready for season; Played through neck stinger all 2023; Saints are comfortable with it

Pretty sure HIPAA does not apply in the NFL. I don't know if players waive it, or what, but their medical conditions are reported all of the time.
It does apply, but yes, there are disclosure rules outlined in the CBA and the NFLPA and NFL have a process for what can and can't be disclosed.