Elopers

Is there a way to set this up like a caretaker mode?  My husband elopes sometimes due to chronic health issues.  I need to be alerted he's leaving at odd times of the day like when I'm asleep.  He is perfectly normal 80 percent of the time, still goes to work part time when he's thinking clearly.  This isn't a situation where he wouldn't be given the code to the security system, but one where if it chimes say at 6 in the morning it would wake me up because that's not normal for him.