Just got this, allegedly from Anthem Blue Cross. With all the identity thieves out there, this is an idiotic way to do this. As far as I know its some scammer using an phone bot phishing to get my personal info.
It's legit Kaiser just calling to give you healthy tips. i dialed back and used the automated system. They give you your message and tell you to use KP.org for any kaiser needs.
This was Beaumont Hospitals in Michigan (where I am) reminding me that I had a video they would like me to watch before my sleep study. Considering others say it is Kaiser Permanente, I am going to conclude that Beaumont must use them to deliver the message (and maybe the video).